A500 seems bricked but not bricked (I think) - Acer Iconia A500

Hi, I cracked my outer screen on my A500 and just got a replacement. The tablet worked fine though. The touch screen still allowed selection of anything on the entire screen even though it had lots of cracks on it. The LCD screen wasn't damaged at all.
Followed the videos to replace the screen that are posted to the letter, slowly and methodically. So I separated the outer screen from the display OK (it was a bit of a challenge since the double sided tape was holding pretty good).
Everything went together OK. I go to start it and the screen glows as it normally does as the very first part of the power-on. But nothing else. No logo, no messages - nothing.
But I plugged it into my PC via micro USB on a whim and lo and behold, I can actually see the internal storage and SD card. Looks like everything is there. And if I do the long press where I recall some of the icons are, I can feel the slight vibration as it selects the icon. So it would also appear that the touch screen is functioning too.
So it looks like the unit boots but for some reason, won't display. The screen just glows faintly like the very first part of a power-on.
Is there hope? Is there something I can do or check? Is there a way to verify the LCD without buying a new one?
Thanks,
Bob

RKramkowski said:
Hi, I cracked my outer screen on my A500 and just got a replacement. The tablet worked fine though. The touch screen still allowed selection of anything on the entire screen even though it had lots of cracks on it. The LCD screen wasn't damaged at all.
Followed the videos to replace the screen that are posted to the letter, slowly and methodically. So I separated the outer screen from the display OK (it was a bit of a challenge since the double sided tape was holding pretty good).
Everything went together OK. I go to start it and the screen glows as it normally does as the very first part of the power-on. But nothing else. No logo, no messages - nothing.
But I plugged it into my PC via micro USB on a whim and lo and behold, I can actually see the internal storage and SD card. Looks like everything is there. And if I do the long press where I recall some of the icons are, I can feel the slight vibration as it selects the icon. So it would also appear that the touch screen is functioning too.
So it looks like the unit boots but for some reason, won't display. The screen just glows faintly like the very first part of a power-on.
Is there hope? Is there something I can do or check? Is there a way to verify the LCD without buying a new one?
Thanks,
Bob
Click to expand...
Click to collapse
Well Bob, glad to see some folks take matters into their own hands!
I can't find the post, as it was a couple years or so ago. But I specifically remember a similar situation. And from what I know, when you tighten/place the screens together, you have to make sure you tighten them evenly, or else nothing works. Something to that effect. Also, I would probably take it apart again, and double check that everything is connected the proper way. Look for possible bent pins and such.
As far as I know, there are no software maintenance apps to check the lcd. Not to my knowledge anyhow, As we pretty much have all maintenance software for the 500/501.
Wish I could be of more help. I know awhile back, a couple of folks here in the forum replaced theirs after their kids stepped on them.

Related

LCD working but no backlight

Thought I'd try talking whilst going for a jog and managed to get some sweat into my XDA Mini. The result: the LCD still operates, but the backlight is broken.
I took it to a repair shop to see if they could repair it but they say I need a full new LCD - not so cheap. The guy seemed a bit dodgy so I thought I'd double check people's thoughts here before I go and spend the $150 to fix it.
I'm sorry if I'm insulting your intelligence, but have you tried holding down the power button while the screen is on? The backlight can be toggled on and off by holding the power button down a few seconds.
Just making sure!
(Eg. Check your floppy drive before you decide that the hard disk is dead - store attendants can actually forget things like that)
Haha,
Yes I have tried everything relating to normal backlight usage, including a hard reset.
I know the backlight is stuffed because for a while it would turn on for a sec before turning off, then finally it went kaput.
Well the backlight probably is stuffed. And $150 is a bit steep for a new screen, but I doubt you will find any better - though if you want try eBay. I just searched eBay US for 'xda mini LCD' and got a range of LCDs from $70 to $100.
The installation isn't too hard, as long as you're careful - it just involves opening the Magician (which takes patience, but isn't too hard or risky), unplugging the old screen, detaching it, and installing the new screen.
Darn,
I found a screen for AUS$115 delivered on ebay.
Is there any way I can tell if I have the black or yellow screen connector without opening the phone up (I'd prefer to have to open it as few times as possible). My guess is that it would be one of the black ones as I think it's an earlier model.
Hey maximus, I know it's been a while. Did you fix your screen? I've got a Trinity with me (also known as Dopod D810) and I put a new screen into it. It worked, but after a few weeks, the alignment went off and would not reconfigure no matter what I tried. Then suddenly, the backlight went dead but the LCD still worked (I can see the content on the screen if I shine a torch on it). I'm an experienced phone repairer but I thought I'd check to see if you did anything to fix your original screen.
I've got the phone open - the connectors are fine. I've tried applying light pressure to the sides of the LCD, hoping that maybe it was just a loose connection inside the LCD, but to no avail.
Looks like I'll have to buy another LCD
hey i'm have=ing the same problem !
there are not any option but new screen

8525 White Screen of Death - Is there Hope?

Ok so I have the fabled white screen issue on an 8525. When it first occurred I searched and read all the write ups, decided I had the ribbon cable issue. Took it apart and simply unplugged and replugged the ribbon cable with great results, no more white screen.
I repeated once when it came back after being bumped around, again with positive results...but this last(3rd)time instead of it working I now get white screen 95% of the time. I re-notched the sliders the first time, and last time.
During the 5% it works I noticed the charge light would correspond to it going white.This never happened before...
Example:
When OFF - Connect charger, Red light for 1 second, then nothing=White screen from power on
When OFF - Connect charger, Red light for 1 second, then orange charge indicator = normal startup
When ON and Working - Connect charger, no light, no charge - reboots to white screen
When ON and Working - Connect charger, orange charge indicator, reboots normally.
There is no heat or noticeable pressure on any parts, everything seems to fit normally.
It does boot normally with screen white.
Any ideas? I really don't want to give up on this thing, is there any hope? or just ebay it for parts?
Thanks
-Nick
same problems here, if someone could just tell me what parts to order, cause I have no warranty (ordered over ebay). I tried both the instruction that has chinese fonts on the page , and other from R&R, no luck, white screen all the way..
I had the WSOD and took it apart and reassembled a few time. The 3rd or 4th time the screem came back, but now it is shifter to the right around 1/4" or so. I mean there is just white along the left edge, then the normal screen/color starts and is cut off on the right.
Does anyone know how to correct that, is it related to the same flex cable or is there something else I disturbed?
mine will fade to white.. then i just push the power to put it in standby, then push power again to wake it back up and back to normal.. it rarely does it but still annoying...
If You Ordered From At&t
I had this problem about 2 weeks ago!!!!
I thought it was a fluke!
Anyway, walked over to 43rd and Lexington (NYC FOR THOSE WHO DON'T KNOW THAT MANHATTAN IS THE CENTER OF THE WORLD)
and they gave me the EXCHANGE HOTLINE for at&t.
I called them up, told them my screen is fading to WHITE and the lady sent me a new or referbished phone.. i dont even know.
Just so you know, i ordered my phone on AMAZON with a new activation. its covered under the MANUFACTURERS warentee for a full year from the date of purchase... so is the REPLACEMENT PHONE... but not from the date of replacement, just the date of purchase.
did anyone get deeper into this yet? I got a 8500 (need those without camera) from ebay USA, already with white screen. After reading here, that this is mostly an issue with connectors, I bought it, disassembled it and reassembled it, though still white. Should I give the contacts a treatment with contact-spray? (there's a tuner spray that doesn't leave residues) Or is there something broken within the ribbon cables? Seller said it has been dropped (but he also said, he didn't want to open it, while it clearly has been opened, one screw missing and warranty seal gone). It ssems to boot up normal otherwise, I hear a sound after the boot process, so probably this isn't a software issue?
Edit: another thing I noticed: When I run it without any keyboard connected at all, it's also white. I then connected the dpad again, and I could see a hint of the at&t logo in the lower part of the screen. When I pressed around on the back of the dpad a bit, all LEDs would go on/off... Sound to me like the dpad has gone bad, possible?
Edit II: Got it. Using a 20x eyeloupe I found that the PCB of the DPad is broken under the little chip on it. Now I just gotta find a dpad here in germany, but I assume those Hermes' are all equal...
hello
where can I get manual (if there is one) for disassembling hermes. link in wiki does not work.
thanks
this worked good for me
http://inuchanbt.blog54.fc2.com/blog-entry-100.html
Anyone know if this applies to the 8125 as well? I've got a flickering white screen. I had dropped my phone a few weeks back and cracked the LCD. Replaced it with an OEM LCD - it worked fine for about 2 weeks and then just suddenly went all white. Phone still works, I can still get calls - just can't see who is calling.
I don't recall that the wizard had the same problem... Though from a logical point, it seems that there is an issue behind white screens and the thumbpad being responsible for it, so it may well be the same thing. Perhaps just disassemble the wizard (there should be a howto too) and check if theres a similar connection from mainboard to thumbpad circuit.
Is there a disassembling manual for a imate k-jam that anyone knows about?
Here's a website with a video manual i found useful...
http://viralelectronics.com/category/howto/page/2/
Figured out the problem...
The only reason I figured out the screen goes blank is because the motherboard loses connection with the screen when you slide the keyboard out...try this out and see if the screen comes back...
put the screen on sleep mode (no white screen)...then slide out the keyboard and tilt it a little hard after pressing on the screen and put the power on. if it doesnt work try again it might take some pressure and power to make it work...be careful not to put too much power but as far as I went, it's a very sturdy cell.
alternately, slide out the keyboard in sleep mode, and press all the buttons really hard and then try to press the power button (press more towards the space bar because that helps)...if any of this works and the screen comes back on even just for a second...follow the following
Go back to the person who gave the link to the site with opening the HTC instructions and follow through and clean the whole phone up from dirt around the screen and such...you dont need to put those rubber things or whatever it says to put on the screen...then when you are putting it back together, press hard on the wire connecting the touch screen to the motherboard. I suggest sealing it with a good tape...and then you are good to go! I did it but it had a few glitches...the screens contrast sometimes goes awry but it is still visible and responds to touch. Also, the physical buttons work as well!!
Good Luck and do it at your on risk.
Have any of you tried this? http://forum.xda-developers.com/showthread.php?t=321163
hope the best
i tried this and it worked for me. i also pressed alil hard around the d-pad and heard a pop. i think it poped back into place.
thanks
razor rc said:
i tried this and it worked for me. i also pressed alil hard around the d-pad and heard a pop. i think it poped back into place.
thanks
Click to expand...
Click to collapse
i still have this problem.
fixed my wsod
I noticed a few days ago my 8525 screen went white, rebooted and it went away. Today it came back, but would only go away for a few seconds and then back to white. After reading some forums I decided to check the connector. I took the phone apart following this site as a guide. I removed the connector on the board side and cleaned the contacts with a qtip and denatured alcohol. Phone has been perfect for the last few hours, no more white screen of death. I didn't mess with the connector on the LCD side, just the board side. I'm a computer tech and I found it quite annoying to disassemble, but I managed without causing any damage, however, I'd rate the job at about a 8/10 as far as technical ability.
Joey
warped0202 said:
I noticed a few days ago my 8525 screen went white, rebooted and it went away. Today it came back, but would only go away for a few seconds and then back to white. After reading some forums I decided to check the connector. I took the phone apart following this site as a guide. I removed the connector on the board side and cleaned the contacts with a qtip and denatured alcohol. Phone has been perfect for the last few hours, no more white screen of death. I didn't mess with the connector on the LCD side, just the board side. I'm a computer tech and I found it quite annoying to disassemble, but I managed without causing any damage, however, I'd rate the job at about a 8/10 as far as technical ability.
Joey
Click to expand...
Click to collapse
i agree that this is one of the first things to try in curing the white screen issue. Others may find their problem runs a little deeper and the contacts on the d/pad chip are broken. An improvised cure which may not be very permanent is to place a little padding on the surface of the chip as described here:
http://forum.xda-developers.com/showthread.php?t=321163
If you have appropriate heat gun equipment you can re-flow the solder on the d/pad daughter board - but remember to remove the sticky key pad layer or you'll cook it!!
I regret that I'm closing this thread because we have several "White Screen" threads and the questions and answers are being spread all over the place.
Please use this one for future posts:
http://forum.xda-developers.com/showthread.php?t=321163
Mike

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.
Click to expand...
Click to collapse
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...
Click to expand...
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?
Click to expand...
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.
Click to expand...
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.

[Q] Nook touch screen not responding

Hi,
On my rooted nook touch, sometimes the touch screen stop working.
It appends whatever software i'm using and randomly. Buttons works, page refresh works too and the nook doesn't lag, it's just a touch screen crash...
I tryed to unregister the nook and to update it from 1.0.0 to 1.0.1 then root it again but the problem still here.
Do you know a solution for this problem ? each time it's append I must hard reset the device (power + right bottom buttons)... is there a service to restart to enable touch screen again ?
Thanks
Hi, I'm new here ^^.
I bought the nook touch 2 months ago, and it worked perfectly until yesterday. I installed MSN Mercury from the market, I logged on my account, but when I clicked the menu button, the touch screen stopped working and I used adb reboot from my pc to restart it (I didn't know how to hard reset).
It scared me a lot, and I uninstalled that msn when I restarted the nook.
I request a solution for this too, and, do you know a simple MSN that works perfectly on our e-Ink nook?.
PD: Sorry for my bad english ^^u
Same as you.
Just screen is out of response.
Happened both 1.0.0 1.0.1.
Sent from my NOOK using Tapatalk
i'd seen a thread about this problem in the B & N forum, many users have this problem but there is still no patch to solve it...
Acidmaster said:
i'd seen a thread about this problem in the B & N forum, many users have this problem but there is still no patch to solve it...
Click to expand...
Click to collapse
Long thread about the subject.
From the thread and running into the issues myself, it seemed to be a sensor/dust issue as the only solution I found working is wiping the screen with a cloth or so. This is kind of sad since I already has a screen protector on it but I guess any bit of dust on the screen could cause the touch function to fail.
monkeygod said:
From the thread and running into the issues myself, it seemed to be a sensor/dust issue as the only solution I found working is wiping the screen with a cloth or so. This is kind of sad since I already has a screen protector on it but I guess any bit of dust on the screen could cause the touch function to fail.
Click to expand...
Click to collapse
I do not have much faith in the dust theory, you'd need some serious dust, like sand, on your screen for the sensor array to even notice it
Remember, it's not a touch sensitive screen like those on phones and pads, but a rather coarse infrared grid "above" your screen.
I've experienced this once myself, and then I simply put the NST away for the night and when I woke up in the morning it was working again which makes me suspect a lockup in the driver,
Had this happen to me. Here is the timeline
1. Girlfriend bought nook for birthday
2. Dropped said nook after 2 months or so
3. Bought refurb off ebay from B&N's ebay account
4. Screen would stop working randomly
5. Contacted support
6. They shipped me a refurb replacement
My second nook wasn't under the extended warranty or even a 30 day warranty. Its a manufacturing issue so they should replace it for free.
Ok, so I had this same problem, and took it to B&N, they said that they hadn't seen that before a gladly replaced it for me. To this day I'm still not sure what caused it, but I know it happened after leaving it in a pretty how car, but not sure if that's linked or not. My current one which I've had for about 5 months hasn't had any problems.
Old thread is Old but I'd gotten mine knocked out of my hands. Screen looks undamaged but the hardware buttons don't appear to do nything other than holding down the n switch to make the glowlight come up. Tried putting it to sleep, plugging it into a computer. Only thing that seems to indicate it isn't a total brick is the glow will come up. Other than that screen has a static of the last book I was reading in coolreader.
Bought the thing for an easter preasent to myself from walmart. Still have the box but it's rooted and til the drop had no problems whatsoever (well problems that weren't due to user error.) Saw a 'leave it overnight' suggestion and am going to ttry that.
Is there anything I can try or is this going to be one of those 'the outside looks fine but the slight bump wiggled something loose that you're going to need to tear the whole thing apart to fix.' things?
Edit: failing that could someone walk me through the button presses/times to press each button to un-root/restore backup using NookManager? I'd be doing that blind as the screen only shows an image from coolreader but I figure better to try taking it back to stock before returning even if nobody looks it over.
Hi All,
Solution for screen as simple as... get tissue, dump it with a bit of water (tap water will do) and clean your screen carefully. Solved Make sure that water gets into corners of screen. There is some kind of filter. It must have connection with top of the screen... some how water do the trick. I was designing custom cover/case for my nook when I discovered it. BTW your finger shod be a bit wet when you use your nook.
Hope it helps!
Thanks
Van
unresponsible touchscreen problem!
vanwaestel said:
Hi All,
Solution for screen as simple as... get tissue, dump it with a bit of water (tap water will do) and clean your screen carefully. Solved Make sure that water gets into corners of screen. There is some kind of filter. It must have connection with top of the screen... some how water do the trick. I was designing custom cover/case for my nook when I discovered it. BTW your finger shod be a bit wet when you use your nook.
Hope it helps!
Thanks
Van
Click to expand...
Click to collapse
Just saw a comment like this on youtube and tried it. It worked! I was so pissed off after so much reset, restart and stuff...! keep it clean! :good:
vanwaestel said:
Hi All,
Solution for screen as simple as... get tissue, dump it with a bit of water (tap water will do) and clean your screen carefully. Solved Make sure that water gets into corners of screen. There is some kind of filter. It must have connection with top of the screen... some how water do the trick. I was designing custom cover/case for my nook when I discovered it. BTW your finger shod be a bit wet when you use your nook.
Hope it helps!
Thanks
Van
Click to expand...
Click to collapse
The Nook doesn't have a capacitative or resistive touch screen, so having a wet finger is irrelevant. Instead, it uses an infra-red touch screen. Between the screen and the grey plastic bezel, you'll see a transparent lens protecting the IR emitters and receivers used to determine finger position. Reportedly, if that gets dirty, it fails to register finger positions.

Is this LCD problem?

Okay, a couple of days have been past now. I was using my phone back then, playing a game and then suddenly the notification led lighted blue and then the screen turned black. But it's still working. I thought it got hanged out or empty battery but it didn't show the samsung logo. So I restarted it. It started and I can unlock the lockscreen but it's all showing black screen. Can't see anything. Menu, home, power, volume and back buttons are all working.
I brought it to phone repair centers and they all said it was LCD problem and I need to pay for like $100(converted) for a new LCD. Are they saying the truth or I can still resolve this?
Yes, there seems to be a physical problem.
I cant say if its the LCD itself, or a cable, or a conector, or the graphics chip on the board. But yes, it seems to be a hardware issue.
If you are able to work on stuff like that, open the phone yourself, clean the board with Isoprophyl, clean the connectors and put it back together.
Maybe that will already fix it. If not, let them take a shot.
If you are not sure about that procedure, there are a lot of videos on youtube showing you how to dis- and reassemble an S4.
First things first, Hi
Second, Only the S4 Active has an LCD screen, the others are AMOLED.
Third, You say that all the keys are working. Are you basing this on the touch sounds, or are the any visual indicators?
what reaper said... if you go ahead and get it repaired insist that you get an AMOLED panel and not an LCD, you'll regret it if you don't...
GDReaper said:
First things first, Hi
Second, Only the S4 Active has an LCD screen, the others are AMOLED.
Third, You say that all the keys are working. Are you basing this on the touch sounds, or are the any visual indicators?
Click to expand...
Click to collapse
yes. ui touchpad works, volume buttons, power and home. i can hear the lockscreen being unlocked when i swipe it after being locked.
it's just the screen is all black.
Backe888 said:
Yes, there seems to be a physical problem.
I cant say if its the LCD itself, or a cable, or a conector, or the graphics chip on the board. But yes, it seems to be a hardware issue.
If you are able to work on stuff like that, open the phone yourself, clean the board with Isoprophyl, clean the connectors and put it back together.
Maybe that will already fix it. If not, let them take a shot.
If you are not sure about that procedure, there are a lot of videos on youtube showing you how to dis- and reassemble an S4.
Click to expand...
Click to collapse
that's what i'm guessing but i let them use my phone and see the problem and they all said LCD considering it's amoled yeah. I may try that but i need tools to open it like small screw etc..

Resources