Two issues with my Touch HD - Touch HD General

Hi, ive experienced two issues with my Touch HD, one of them is that the phone calls get disconnected at a random time. I can talk for 5 minutes and suddenly the phone shuts down the call... And the other issue is with the screen, wich is demonstrated on the attached picture. It comes and goes, so its not persistant but it looks really bad on the screen when its there. The attached picture is coming from a Diamond, and it looks exactly like the problem I have on my Touch HD.
Can anyone confirm this and perhaps come up with a solution?
Thanks

Hello
If you have the protection foil adhesed to your screen it could definitely be that...
Consider that your device heats up when charging or while you do lot of stuff with it - hardware heats up and the glue or whatever it is comes off so your foil does the same
My friend had the foil on but got really fed with it so he just took it off and no more stuff like that on your screen...
If you do not have this foil it is probably a HW issue with your screen thus you should get it replaced - whole device of course....
hope I helped...

about random dropping the calls there are several discusiions around. just use search option!
hint:
try to change settings-phone-band-network type from auto to just gsm
3g is known as often drop the quality and maybe your phone try to switch from 3g to gsm.
if this is not the situation, look around, maybe someone found the solution
about the rainbow stain, could it be just moisture caused by moving from cold temperature to warm temperature?
is it still there if your phone is out in cold air? did you noticed if the stain is always there or it occurs only when the phone became hot?
if this is the situation, you have to remove the shield from screen and install it (or a new one) again but on a dry screen.
if you don't have a screen protector, then your problem is more complicated as the moisture is between your screen layers and can be changed only at a htc service center

I also read somwhere (forgot where) that the rainbow stain can be caused by pressure
yours is a very neat rectangle
does it always appear in the same place ?
when the pressure releases later it can then vanish

this is the link, it also explains how to solve the stain issue
http://forum.xda-developers.com/showthread.php?t=468840&highlight=oil+stain

Sopis said:
Hello
If you have the protection foil adhesed to your screen it could definitely be that...
Consider that your device heats up when charging or while you do lot of stuff with it - hardware heats up and the glue or whatever it is comes off so your foil does the same
My friend had the foil on but got really fed with it so he just took it off and no more stuff like that on your screen...
If you do not have this foil it is probably a HW issue with your screen thus you should get it replaced - whole device of course....
hope I helped...
Click to expand...
Click to collapse
Hi Sopis, no I dont have the protection foil on my screen, its not the issue here, but thanks for your idea.

zesper said:
this is the link, it also explains how to solve the stain issue
http://forum.xda-developers.com/showthread.php?t=468840&highlight=oil+stain
Click to expand...
Click to collapse
Zesper, thanks for the link.. this is the issue with my Touch HD. Its now shipped for repair and I hope the warranty will cover it. The funny thing here is that the problem comes and goes.
Regarding the dropping calls, ill try with the switch to gsm, once its back again from repair.
Thanks

Related

Vario II Touch Screen goes off :(

Hello
I bought mine Vario II (with CoPilot) just 8 days ago, so I've enjoyed it quite a lot for the past days
yet .. ~30 hours ago I found out that the touch screen was not responding at all .. well restart did not help, getting the battery out and putting it back again didn't help too ... I tried to do EVERYTHING with the thing ... starting with restoring factory settings (all the data! ) , ending with browsing the forums for common failures ...
Finally I ended up with the very start page where the Vario II asks for tapping the screen (irony huh ?) to start setting it up ..
Since I was not able to make it work again (the whole thing seemed to be working fine ... just the touch screen ... ) so I brought it to the local T-Mobile shop today in the morning.. guess what, the guy at the shop just removed the battery and put it back again (I've done that XXX times during the night) AND IT STARTED WORKING again ... I couldn't understand anything there, felt really lame
anyway after I've left the shop and used it for quite a bit it started again .. now I've kind of figured it out .. when I'm using the device actively (the temp raises) and it starts at the top right corner of the screen .. the touch screen just flickers there and then after a minute or so it doesn't respond at all any more .. if I just put it away and don't use it - the screen responds again after some time ...
NOW finally the question is: has anyone had any problems with Vario II like I do? I ought to think that it is a somewhat faulty device that I've got (it hasn't been physically damaged)
PS the touch-screen gets stagnant faster with bigger programs (CoPilot, Skype, etc...) and it takes some time to get stuck with just using the phone...
btw I've put a temperature thingy in the device - it shows that the battery temp is at 42 C . Isn't that a bit too much ?
yeah and how do I figure out what version it is ? I mean the S/N that is mentioned here ( http://wiki.xda-developers.com/index.php?pagename=Hermes_Problems )
?
wundis said:
anyway after I've left the shop and used it for quite a bit it started again .. now I've kind of figured it out .. when I'm using the device actively (the temp raises) and it starts at the top right corner of the screen .. the touch screen just flickers there and then after a minute or so it doesn't respond at all any more .. if I just put it away and don't use it - the screen responds again after some time ...
NOW finally the question is: has anyone had any problems with Vario II like I do? I ought to think that it is a somewhat faulty device that I've got (it hasn't been physically damaged)
Click to expand...
Click to collapse
Yes, one of my Hermes' had the exact same problem - touch screen malfunction starting at the upper right corner when temperature rose. The usual tricks to solve the screen alignment problem (loosening the screws, removing the gasket with a stripe of a business card) didn't help at all. I returned the device and got a new one.
yeah and how do I figure out what version it is ? I mean the S/N that is mentioned here ( http://wiki.xda-developers.com/index.php?pagename=Hermes_Problems )
?
Click to expand...
Click to collapse
It's printed on the box (at least of an O2 Trion) and on the sticker underneath the battery. Just look for the S/N starting with HTC6xx... but "our" defect is not the normal SA problem, it seems to be much rarer and not described in the Wiki.
Cheers
Daniel
Thank you so much for the answer Daniel, I'll get them to change it tomorrow.
I have exactly the same problem with my TyTN. In the morning, after the phone has been off all night, the touchscreen works for maybe 30mins, then the phone warms up and the screen ceases functioning. Bizarre though - I got the phone about two weeks ago - the screen worked fine (i.e. under all temp. conditions) for about 7 days, then it decided to crap out. Tried all the usual SA type solutions - as you guys noted above they didn't work. Gonna have to go back to the shop and get it replaced :-(
Oh, nearly forgot, s/n is HT632
One other thing I noticed (not sure if this is normal behavior or if it started after the touchscreen borked) - When the phone is active (i.e. not locked or in standby,) the top status leds (wifi, bluetooth, gsm) don't flash. Once the device is put in standby (i.e. tapping the power button) they start flashing again. Like I said, not sure if this is normal or if its related to the touchscreen going.
Vrobenmat said:
One other thing I noticed (not sure if this is normal behavior or if it started after the touchscreen borked) - When the phone is active (i.e. not locked or in standby,) the top status leds (wifi, bluetooth, gsm) don't flash.
Click to expand...
Click to collapse
This is definitely not normal. But it's an interesting observation. If the TyTN were a car, I'd say there's a bad ground connection somewhere.
Try a hard reset, and if that doesn't solve the problem, have it exchanged. (I very much doubt that a hard reset will help, but at least here customer service refuses to exchange a device before you tried a hard reset. )
Cheers
Daniel
Hard reset borked even more. Could't get past the touch screen calibration. Phone is now in the freezer to cool down - hopefully the touch screen will work long enough so I can get past the calibration
*EDIT* Just got it out the freezer (nice and cold now.) Hard reset, got through the calibration, everything ok for about 10 mins. LED's flashing with backlight on and touchscreen working. Then - touchscreen non-responsive at exactly the same time the status LED's cut out. I'm hypothesising that there's some kind of electrical short between the circuitry for the touchpad and the status LED's - it shorts as the devices temperature rises and (i guess) some of the materials expand and come into contact with each other. Since I don't want to void my warranty in case I have to take the phone back to the store, I haven't opened it up to confirm this. Has anyone had a detailed look at the connections at the top of the screen and around the status LED's to see if my explanation is at least possible? (then I might open it up and see if I can insulate the connections.)
tadzio said:
Yes, one of my Hermes' had the exact same problem - touch screen malfunction starting at the upper right corner when temperature rose. The usual tricks to solve the screen alignment problem (loosening the screws, removing the gasket with a stripe of a business card) didn't help at all. I returned the device and got a new one.
It's printed on the box (at least of an O2 Trion) and on the sticker underneath the battery. Just look for the S/N starting with HTC6xx... but "our" defect is not the normal SA problem, it seems to be much rarer and not described in the Wiki.
Cheers
Daniel
Click to expand...
Click to collapse
I have the exact same problem!!
Two additional points :
1) my device screen will not switch off automaticaly and will stay on for ever unless I switch it off
2) When the issue manifests itself for the first time the device would automaticaly go back to the today screen like if the OK button would have been pressed many time or ... was stuck!!
That's my second Tytn device the first one had the SA defect.
I was so happy when I got my new one because the S/N showed HTC637XXX but sounds like a new issue even though I'm pretty convince that that the SA issue is not far from being related to this one.
My device SPV3100 HERM100
Hello lads,
Absolutely everything you've posted seems to be happening to my device.
Now the touch screen fails to respond even if it's cold (been lying on the bed for 5 hours doing nothing at all .. ). damn... seems like I'll have to ask the local shop to get me a free portable refrigerator for the thing to work properly
HT645
Vrobenmat said:
Hard reset borked even more. Could't get past the touch screen calibration. Phone is now in the freezer to cool down - hopefully the touch screen will work long enough so I can get past the calibration
*EDIT* Just got it out the freezer (nice and cold now.) Hard reset, got through the calibration, everything ok for about 10 mins. LED's flashing with backlight on and touchscreen working. Then - touchscreen non-responsive at exactly the same time the status LED's cut out. I'm hypothesising that there's some kind of electrical short between the circuitry for the touchpad and the status LED's - it shorts as the devices temperature rises and (i guess) some of the materials expand and come into contact with each other. Since I don't want to void my warranty in case I have to take the phone back to the store, I haven't opened it up to confirm this. Has anyone had a detailed look at the connections at the top of the screen and around the status LED's to see if my explanation is at least possible? (then I might open it up and see if I can insulate the connections.)
Click to expand...
Click to collapse
Might get a chance to have an internal look tomorrow. From memory, and can't remember if the Wiki or Japanese dismantling site shows this, but I recall only a single mylar ribbon cable coming from screen area through to main board. There are if memory serves push in multi connectors from the bottom hard keypad and from front camera board (inc LEDs) to the muti ribbon cable on the back of the screen. Thus, simply put the screen, camera,hard phone keys all connect at the back of the screen to a single multi ribbon cable that goes to main board. Possibility then of a short with digitizer is at least possible. Of course digitizers are suceptible to current leakage and field interference so would not have to be an actual physical contact but could just be a close proximity issue.
Mike
Facing the same problems...
... I've been thinking about repalcing the display and the touchscreen. But now, considering that it is a HW issue, I can only replace these two things. If the bug is in the module above the screen (statur leds and camera) or related to the wireing at the back of the screen, it won't get rid of the problem. On the other hand, if it is a problem with the screen getting too hot, then I'm on the right track...
Has anyone tried this yet?
I'll try to call HTC on monday, maybe they know where the bug is.
HTC is not able or not willing to share what they know about the problem...
Hello, they excuse my English, I am possessor of a TYNT and I am with he himself problem that you, the problem is a failure of weld in the processador, when it reaches certain temperature fails and cooling it or pressing strongly on the processor it lets fail.
Greetings.
ezbook said:
Hello, they excuse my English, I am possessor of a TYNT and I am with he himself problem that you, the problem is a failure of weld in the processador, when it reaches certain temperature fails and cooling it or pressing strongly on the processor it lets fail.
Greetings.
Click to expand...
Click to collapse
There may well be truth in what you say, I too believe it is something similar in some cases.
Do you have any proof of your suggestion. Can you provide pics or a diagram of the solder point you mean??
Mike
Hmm? The processor...?
...sorry, don't think so.
It's just that this bug occurs after using a device for months, isn't it?
Now, the first two weeks I installed all kind of programs using the wireless LAN almost permanently. My Hermes was never as "hot" as during its first two weeks. And what about the sliding-out of the keyboard? Doesn’t it always start there? This just doesn't sound right, does it?
Just received an email from someone who drew my attention to the ribbon cable connecting the upper and the lower part. What if there is a short one due to the plastic scratching the cable and then... who knows?
However, I do not disagree as far as the temp is concerned. Therefore, I'll put my Hermes on ice and see how long it does things right...
And still, there is no chance that it is related to the processor. If the processors ALU is getting too hot the entire device would be effected, wouldn’t it?
Anyways, I'm determined to find out what it is!
++ I just found a very peculiar post in the WIZARD forum. It was about some top-side buttons that kept pressing
++ without even touching… Opening the assigned programs over and over again. Odd, isn’t it?
++ That’s a HTC device AND has a sliding keyboard with a ribbon cable as a connector…
++ Yet, it operates with a different processor on a different main board.
++
++ Still blaming the processor?
microft said:
...sorry, don't think so.
It's just that this bug occurs after using a device for months, isn't it?
Now, the first two weeks I installed all kind of programs using the wireless LAN almost permanently. My Hermes was never as "hot" as during its first two weeks. And what about the sliding-out of the keyboard? Doesn’t it always start there? This just doesn't sound right, does it?
Just received an email from someone who drew my attention to the ribbon cable connecting the upper and the lower part. What if there is a short one due to the plastic scratching the cable and then... who knows?
However, I do not disagree as far as the temp is concerned. Therefore, I'll put my Hermes on ice and see how long it does things right...
And still, there is no chance that it is related to the processor. If the processors ALU is getting too hot the entire device would be effected, wouldn’t it?
Anyways, I'm determined to find out what it is!
++ I just found a very peculiar post in the WIZARD forum. It was about some top-side buttons that kept pressing
++ without even touching… Opening the assigned programs over and over again. Odd, isn’t it?
++ That’s a HTC device AND has a sliding keyboard with a ribbon cable as a connector…
++ Yet, it operates with a different processor on a different main board.
++
++ Still blaming the processor?
Click to expand...
Click to collapse
And you are right too! if it appears that I am tending to agree with both above posts when on the face of it they disagree with each other it's because:
1
There are different manifestations of this problem - the causes may not always be the same
2
I agree it's NOT the processor and firmly believe it's hardware related. Of course it could be be a break (sometimes intermittent) in contact somewhere between screen and board or even a broken contact on the board (IN SOME CASES)
3
In other cases it's just pressure being put on the touch sensitive screen often at the very inconvenient top right corner that closes/minimises applications or opens start menu.
There has not been a reliable way to fix this issue other than device replacement. Replacing the screen has been notable for it's failure to resolve the issue.
Mike
mikechannon said:
And you are right too! if it appears that I am tending to agree with both above posts when on the face of it they disagree with each other it's because:
1
There are different manifestations of this problem - the causes may not always be the same
2
I agree it's NOT the processor and firmly believe it's hardware related. Of course it could be be a break (sometimes intermittent) in contact somewhere between screen and board or even a broken contact on the board (IN SOME CASES)
3
In other cases it's just pressure being put on the touch sensitive screen often at the very inconvenient top right corner that closes/minimises applications or opens start menu.
There has not been a reliable way to fix this issue other than device replacement. Replacing the screen has been notable for it's failure to resolve the issue.
Mike
Click to expand...
Click to collapse
So do you think the bug is to be found on the main board at all?
I'm planning to replace some parts from the screen half. In fact there are just 3 possible error sources:
1) The lcd in combination with the digitalizer;
2) The ribbon cable connecting screen parts and keypad at bottom; and
3) The keypad at the bottom itself
The ribbon cable includs the electronics for the status leds as well as the EARphone. ;-)
Soon I will be on all three of the above parts and if the error ain't there... I'm going to be MAD.
Will keep you IN THE LOOP!
Hello again, my conclusion is based on which I have disassembled my TYNT completely and I have connected it without the keyboard, of this form I have hoped to that it began to fail, later I have been moving and touching in any case the flat cable that unites the motherboard with the screen, the small circuit that takes built-in without obtaining results, single I have even obtained that it returns to work blowing air on the strongly pressed processor or on. Another observation is that if just ignited the machine and working correctly we applied single heat on the processor, begins to fail the touch screen. To my also is to me strange east failure since the temperature of the processor is not excessive when it fails, in fact desire firmly to be mistaken because there am lost the guarantee. Seguire investigating is matendre informed to you.
Greetings.
microft said:
So do you think the bug is to be found on the main board at all?
I'm planning to replace some parts from the screen half. In fact there are just 3 possible error sources:
1) The lcd in combination with the digitalizer;
Click to expand...
Click to collapse
May be a fault there, but if it's just a squeeze due to heat ? pressure it may not resolve the issue.
2) The ribbon cable connecting screen parts and keypad at bottom; and
3) The keypad at the bottom itself
The ribbon cable includs the electronics for the status leds as well as the microphone.
Soon I will be on all three of the above parts and if the error ain't there... I'm going to be MAD.
Will keep you IN THE LOOP!
Click to expand...
Click to collapse
I assume you mean earphone above as the microphone is on the mainboard.
Mike
Again I have tested, with the disassembled machine totally, start up it, I hope to that the touch screen does not respond and I put my tynt in the refrigerator, after two minutes and without moving I touch it the screen and magic, works correctly hata that again coje the room temperature.
Greetings.
ezbook said:
Hello again, my conclusion is based on which I have disassembled my TYNT completely and I have connected it without the keyboard, of this form I have hoped to that it began to fail, later I have been moving and touching in any case the flat cable that unites the motherboard with the screen, the small circuit that takes built-in without obtaining results, single I have even obtained that it returns to work blowing air on the strongly pressed processor or on. Another observation is that if just ignited the machine and working correctly we applied single heat on the processor, begins to fail the touch screen. To my also is to me strange east failure since the temperature of the processor is not excessive when it fails, in fact desire firmly to be mistaken because there am lost the guarantee. Seguire investigating is matendre informed to you.
Greetings.
Click to expand...
Click to collapse
This is very interesting. When I said above it is not the processor, I meant it is not a software issue related to the processor. It can of course be a heat related problem with the processor. To summarise what you have found:
1
You have a device that when first started works OK
2
If you apply heat (but not much) to the processor it fails
3
If you apply pressure to the processor it works again
4
It begins working again when you blow on the processor or put it in the fridge.
5
If you move/press or ensure the ribbon cable has a firm contact - this has no effect.
Please post if any of the above is NOT correct ALSO please post which chip you are heating/pressing.
Cheers
Mike
Hello again, everything is correct except point 3 really when this failing and you press on the then microprocessor the touch screen works correctly. Associate images.
Greetings.
EDIT by Mike. Point 3 has been edited in Mike's post to show the correct situation.

Sofbank SN:HT647xxx Screen alignment trouble after sync or wifi on

I 've HTC Softbank SN:HT647xxx after buy screen very good but now (after 1 month) Screen alignment trouble after sync or use wifi... Everyone have the same my troube? Pls help me Resolve this trouble.
tuninh said:
I 've HTC Softbank SN:HT647xxx after buy screen very good but now (after 1 month) Screen alignment trouble after sync or use wifi... Everyone have the same my troube? Pls help me Resolve this trouble.
Click to expand...
Click to collapse
Unfortunately this sounds like the heat related alignment problem. When the device gets warm e.g when using wifi or charging say when connected to Active Sync, the heat causes a small internal expansion. This puts pressure on the edges of the touch sensitive screen.
If you have a warranty, use it, because there is no guaranteed fix.
If you don't have a warranty then the Wiki here outlines the things to try. Essentially for you I think it would be to unscrew by one quarter turn, the two screws on the back of the screen. Secondly, the business card trick of running the corner of the card between the screen edge and the bezel of the casing. There is a thin rubber gasket in there and the card can be used to free up a bit of room. This may cause small rubber granules to come free. Don't leave a lumpy mess of granules in there though. Best clear it right out. This is a warranty voiding procedure!!
Replacing the LCD is not likely to improve matters as actually the screen is probably fine, It's the pressure being put on it!
Mike
Thanks so much Mr.Michael Channon,
I tried all idea on the wiki xda but can't align sceen, the screen don't respond, after turnoff screen & charging about 5minutes screen working correct, but only working for some minutes.
I don't know what's is trouble. Everybody can help me...
tuninh said:
Thanks so much Mr.Michael Channon,
I tried all idea on the wiki xda but can't align sceen, the screen don't respond, after turnoff screen & charging about 5minutes screen working correct, but only working for some minutes.
I don't know what's is trouble. Everybody can help me...
Click to expand...
Click to collapse
Well, as I said above it sounds heat related and there is no fix other than the things you have tried - you need a replacement. Someone on this board ended up keeping the device in the fridge so they could get half an hour from it before it conked out again. It's a replacement job IMHO.
Mike
mikechannon said:
Well, as I said above it sounds heat related and there is no fix other than the things you have tried - you need a replacement. Someone on this board ended up keeping the device in the fridge so they could get half an hour from it before it conked out again. It's a replacement job IMHO.
Mike
Click to expand...
Click to collapse
----------
I check temperature by BatteryStatus tool is : 45.7C (temperature is normal or not).
What is gets warm, CPU, VGA...
I think LCD hots not influence touch sensitive screen, becausse lastime I use XDA IIS device very host when use wifi but screen no problem.

Hermes White screen

I have read many threads and forums about the problem of the Hermes becoming white. The soft reset in this case does not help.
I found the explanation in my case and I am not able to fix it quickly, without opening the device to screw the connector.
The problem is only due to the temperature of the device. When the temp is to hot, the screen is white, in my case, it typically happens when it stays in my pocket et I moving too much throug the office ;-)
Solution, simply open the keyboard and gently blow in the thin area between the two parts of the device.. in my case, the screen comes back in 2-3 seconds.
Enjoy !
Eric
Hermes/Schaps 4.31/Orange CH
To be honest, I have this problem on my 838 (wizard) previously.
I have found someone (engineer who I need to pay) help me to check.
It is actually the connection cable between the keyboard and screen start breaking.
This makes the connection poor.
End up, my wizard cannot be repaired and I have borrow my freinds hermes to use in the mean time.
I suggest you pay special attention to it.
I suppecm that you blow it is actually helping the connection of that cable.
huh
are you guys serious in what you're talking about?
blow in between the two parts of the device when it's hot to get the connection of the cable back?
are you sure you are talking about a mobile phone and not about a compressor?
thanks for your feedback. I am convince that in my case, the gentle blow does not move the connecting cable.
Additionaly, the tipical symptom reported in various thread is that the soft reset does not help, while letting it apart for 15 minutes does help. It can confirm that the simple temperature idea is fine.
Again, it works for me, it can help others, and sorry for the others that won't find a solution with mine!
actually, i am neutal to this topic.
But just want to share my experience.
In my case, my cable is aging. Initially, it can help with slide the keyboard open and close.
End up the engineer told me that cannot be repaired deal to no parts. he examined it using a microsope watching the cable.
no need to take it too series.
It is a cable connection issue, it is caused by either dropping or opening and closing the device numerous times. It can be fixed the part cost around $20 kinda hard to find but can be found if you search enought. I can repair the device if your interested either pm me or you can contact me at
[email protected]
nate
when this happened to my hermes last August i found slightly unscrewing the two screws on the back of the screen fixed it & not had a problem since
didnt know what the white screen was 'till i got it right after the external volume crapped out, so tired of tinkering with hermes, going Kaiser
As a science experiment I have bought a number of hermes on ebay- it is a cable connection issue or worn cable in the 4 I have played with - all fixed by cleaning and reinstalling cable/connection or replacing the cable assembly. I cant say this is the only bug but 4 outy of 4 inducates a trend to me
John
Oh my gosh, topic starter, that is the same exact issue that I frequently have with my 8525. I eventually found out that if I leave it in direct sunlight, put it in my pocket for too long, or in anyway expose it to relative heat, then it would turn white.
That's a nice "fix" you have there hahah. As for me, I just let it cool down by placing it in a cool and shaded place, works like a charm after a few minutes.
Anyone with a WHITE screen MUST READ this!!!
To bring credit to what I say below, I haved had tinkering experience with electronics for the past 10 years, not to mention that I am currently a 3rd year electronics engineering student.
I currently have 4 hermes units.
When I first had the white screen prolem on my first hermes about a year ago (may be 8-10 months?) my research on the net revealed that the problem is apparently the connector on the button pad board (part number 50H000380-30M-A). After serious tinkering and tweaking I finally got the (extremely sensitive) connector connected up so that the white screen issue actually dissapeared. However, since the connection was so delicate and so sensitive, I had to fix it in place with a hot glue. Hot glue actually added some thickness to it; given that there isn't much tolerance between the top of the connector and the cover, I needed to scrape away some plastic without putting a hole in it so it can accommodate the extra thickness, this is also required for the sliding function to be smooth.
However, right now I have 4 hermes, and I am faced with the same issue. On two units I have the white screen problem. After some intuitive testing I have found that the problem is not with the flex cable, nor with the connector on the flex cable, nor the connector on the button pad board. The problem is with the actual button pad board itself, as it contains fair bit of circuitry on board.
This is how I came to the conclusion. Since the white screen can be fixed with sensitive alignment of the connecor on the board, I wondered if it will display anything with that D-pad (button pad board) disconnected. On trial, it didn't display anything on both a functional unit and a unit with a white screen issue. From this I made the assumtion that the LCD initialisation sequence is contained on the button pad board (part number 50H000380-30M-A).
Having made this assumption, I thought since the symptoms of having it disconnected on a functional unit is the same with a unit that has the white screen symptom, I wondered if it will fix the white screen problem if I changed over the button pad board. On trial, I found that the white screen problem was a thing of the past. So, I don't know what on the button pad board actually causes the white screen, but it is DEFINITELY the board it self and not the connector.
PS: I don't know the proper names of the components but by the button pad board I am talking about is the board that lies under the front buttons of the unit that has the call, end call, start, ok...etc buttons.
uengin, u totally had make ur homework regarding the white-screen-issue.
Anyway, for me, I face the exact problem too. And my way is much simpler. When ever I face the white-screen problem (this cause by the high temperature, coz I notice it only happen when I put my 838 on my pocket while walking during sunny day), I simply turn off the screen for a while (by lightly pressing the power button), like 3-5 second, then turn on the screen back. And, voila~ it back to normal.
i get a white screen when i press on the plastic casing on the lower right side of the screen, above the right bar button. no temperature involved here. sending the hermes to sleep and waking it up restores the normal screen.
pcpc said:
i get a white screen when i press on the plastic casing on the lower right side of the screen, above the right bar button. no temperature involved here. sending the hermes to sleep and waking it up restores the normal screen.
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There's actually a BGA chip in that vicinity on the button pad circuit board. It may or may not be that chip thats causing the issues, but I find it higly likely it is...
uengin said:
There's actually a BGA chip in that vicinity on the button pad circuit board. It may or may not be that chip thats causing the issues, but I find it higly likely it is...
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Click to collapse
if it is the chip, then this would be a loose soldering point?
would you recommend to handle the hermes with great care? eg. not putting it in my trouser pocket because oft the pressure?
pcpc said:
if it is the chip, then this would be a loose soldering point?
would you recommend to handle the hermes with great care? eg. not putting it in my trouser pocket because oft the pressure?
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Click to collapse
I doubt its a "loose" solder joint. It could be a dry joint. But then again you never know. However, the symptoms with the heating and cooling mentioned in the thread it could be one of the several devices on the button pad board failing due to heat.
As a general rule of thumb, definitely electronic devices of this calibre should be dealt with a level of care indeed.
nohanz said:
uengin, u totally had make ur homework regarding the white-screen-issue.
Anyway, for me, I face the exact problem too. And my way is much simpler. When ever I face the white-screen problem (this cause by the high temperature, coz I notice it only happen when I put my 838 on my pocket while walking during sunny day), I simply turn off the screen for a while (by lightly pressing the power button), like 3-5 second, then turn on the screen back. And, voila~ it back to normal.
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Click to collapse
Same for me which seems software issue but how to solve it
I'm having white screen problem too. I highly doubt it has anything to do with a cable because:
1) I almost never use keyboard, aka don't slide open the phone
2) lately white screen often happens when I touch a screen.
3) several times white screen got fixed by holding the phone next to aircondition outlet.
4) white screen recently started at the same time I've noticed that the battery started dying, it doesn't last as long as before. Before this battery I had another one, similar, and also never had white screen while that battery was new.
To conclude all this, at least in my case is more likely it's a battery issue and/or overheat. Tomorrow I'll use the original battery (I've replaced it with 3k mAh 2 years ago) this should proof me right or wrong.
My white screen issues started after a waist-high drop onto concrete, accompanied by the D-Pad and the surrounding buttons not working. In order to get the white screen to go away and the buttons to work again, I have a simple 2-step process:
Put the Hermes to sleep
Press hard right above the D-Pad/below the screen
When I wake the device up, it works just fine!
Interesting Find......
I just noticed something about my white screens.
IF the poweron led does NOT turn on then I get white screen when turning on my hermes.
If the poweron led turns ON(lights up) when turning my phone on then it won't white screen on me.

Damaged digitiser?

Hi folks. I have damaged my topaz but I'm not sure if it's the digitiser or the lcd screen, so I'll describe what happens:
The touch screen will stop responding after I've been using it and if I turn off the screen I can see a small dark patch (where my finger last touched it) with some small tiny 'bumps' surrounding this dark area. If I gently rub the screen with a soft cloth or similar, this dark area disappears and the touch screen starts responding again. However, I am having to do this procedure a lot - I mean like every 10 or 20 seconds if I'm touching the screen a lot or dragging stuff around - heck, it's a 'touch' phone, I can't help but touch it !!!
A new screen is a lot more than a new digitiser, and I figured that since the digitiser sits on top (right ) then it may be this that is u/s ?
Any help, comments or diagnostic clues are much appreciated.
Cheers, peace
Chris
umm, can it be water between the screen and touch sensor layer? Have you brought the phone to highly humid places, or something like that?
Some photos will definitely help identifying the problem.
Sounds like this:
http://forum.xda-developers.com/showthread.php?t=522813
I had it, and my provider repaired it. Unfortunaly I have the problems again... but not that much. When its getting too extreme, I'll send it back once again
^ I'd say that's it, I did find another post with a photo of something similar too.
I think mine happened when my wee girl got a hold of the phone -
I'm still a little unsure as to what component is damaged tho. Maybe a little 'investigation' with a screwdriver is needed ...
Thanks for the replies so far
Peace
Using a screewdriver will defenetly kill your guarantee. Mine was repaired for 0€$ ... I would try this first, as you can still offer it back when they say u have to pay few 100€$.

HTC Trophy Screen Defect

I've noticed a defect on my screen, it looks like a watermark, as if the glass hasn't been coated correctly.
I took the phone back to the shop today and swapped it for another which has the same issue (although not so severe). It's most noticable when the screen is off in bright light.
I'm waiting for new stock to arrive Friday but in the meantime has anyone else noticed this problem?
Nope. Everything fine here. (Or at least I can't find anything )
Ah great, I was thinking it was just me.
I can see it in mine too, around the borders of the glass and especially around the windows button. It mostly shows up when there's fingerprints on the glass, you can see a distinct lighting change around the affected areas.
I'll try to get a picture of it.
Ah ok, found it.
But I don't think that this is a defect or sth.,
My guess: These areas lipophobic? Maybe there was some glue on it? Some you won't see any fingerpints on these areas. This would eplain why you can't see them when there are no fingerprints on the screen.
No big deal for me tough.
I don't think it's glue. It looks like a screen coating.
I've tried removing it with both isopropyl alcohol and thinners and neither would touch it.
I thought it was a plastic cover to peel off - but no
Me too, I thought it was a plastic cover to peel off - but no it does not peel off, i have air gaps under the edges on 3 sides - and the largest is under the htc screen logo :-(
Me too - one long finger top left and some other places bottom and side
pretty sure its some sort of glue residue - you can feel a slight change in resistance
can see it easily by blowing on glass - seems to resist condensation
looks just like screen has been given a quick wipe to clean and they've missed a couple of bits top and bottom.
tried screen wipes and opitcal wipes but no effect
Me too
Recieved mine yesterday, immediately noticed the effect. All along the bottom by the buttons, and along the the left hand side.
Looks like 2 layers didn't completely bond perhaps? The glass and whatever provides the black background.
Tim
me as well, ill upload a video of mine in half an hour, its pretty bad on mine, most of the time it isn't visible. and yeah resistance on that area is different when i rub my thumb hard over the screen it is smooth, but over those droplet like parts there is friction..im guessing that most of my screen is coated and those bits are mistakenly not.
(i thought it was the other way round before)
VIDEO OF SCREEN DEFECT-VIMEO
Same issue here - like an air bubble just beneath the surface of display. My device is slightly affected across the top edge, which is not so bad, but there is a large blob just below the windows key along the bottom edge which is a little distracting. Shame it looks like HTC shipped with such a widespread product defect, as this appears it could be.
Am also finding GPS very flaky - location services more often then not just don't work.
Still, very impressed with WP7. Think HTC could do better ... am wondering what the Samsung is like and what the Venue Pro will be like. Tempted to switch!
same issue here. seems all devices have this feature ...
ps: today in the office i checked again the screen and found out that you can find this bubbles around the screen everywhere. seems it reacts on humidity. strange ...
I've been back to the Vodafone store today as they had received new stock. Both handsets we looked at had the same issue.
The manager at the store said that HTC were going to be issuing a recall and that they were aware of the problem.
I am awaiting a call regarding an alternate replacement.
Ok for me!
same here, especially around bottom left corner, around the left arrow.
I noticed when you wipe the screen hard it disappears, but after a few touches of the screen it appears again.
I wrote to the HTC also and waiting for the reply :
same here - allaround the screen
enak said:
I've noticed a defect on my screen, it looks like a watermark, as if the glass hasn't been coated correctly.
I took the phone back to the shop today and swapped it for another which has the same issue (although not so severe). It's most noticable when the screen is off in bright light.
I'm waiting for new stock to arrive Friday but in the meantime has anyone else noticed this problem?
Click to expand...
Click to collapse
i think everyone have this problem, specilly from vodafone. and i also have software issue, everytime after using the marketplace, and the icon of some apps were gone, and no preview of the pictures. also the apps download from marketplace not seems to be running, after long time use.....already retun the phone to vodafone, and waiting for the issue to be solved...
My screen is ok. Well, not really oké. Since they didn't put a slcd on it, but a worser screen... Luckily no bubbles. I checked it 1000s times in all kind of lights and darknesses and with and without finger prints. But no bubbles here.
Same problem !!!
I have the same Problem (Austria, A1)
HTC Trophy
Hi,
Same problem here, bottom and one in the top.
Vodafone Portugal here :-(
I bought mine 2 weeks ago. Will Vodafone give another phone?
Thank you.

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