[Q] Black screen after replacing LCD, help! - Defy Q&A, Help & Troubleshooting

Hello guys, I dropped my phone so I ordered a LCD replacement since I got some blue dots on the screen, I replaced it, but it shows nothing,only black screen, but it flashes like doing something, I thought it was broken, so the seller sent me another one, and it has the same problem, this is weir,d I don't think the seller is giving me broken LCD screens, is there anything that I can try on the screen, it's no the motherboard, because everytime I switch between the replacements and the original one (the damaged one) it works with no major installation procedures, I mean, two broken LCD screens is weird, could you help me out please? thank you!

That means you didn't ordered the right parts (LCD is kind specific for M525 and M526?).

pgreed said:
That means you didn't ordered the right parts (LCD is kind specific for M525 and M526?).
Click to expand...
Click to collapse
Well, it said it was compatible with Motorola Defy MB525, which is my model :S any idea? thanks!

Related

Question about HD2 screen and digitizer change

Hello,
i cracked my HD2 screen (digitizer), i purchased new one, but the cracked one was working and i was not in a hurry to change it. After a minor drop, the LCD touch screen cracked under the cracked digitizer and now i have black screen...
Now also i have to purchase LCD screen, but i saw that there is ready to use screen+digitizer(and of course more expensive than screen and digitizer alone) .
My question is - what will be easier to change - ready to use digitizer + screen, screen and digitizer alone or there is no difference. I'm asking this, because I'm wondering should i sell the digitizer (if i can) and buy the ready to use screen+digitizer, or to purchase the screen and to use it with the already received digitizer.
If you can afford it you have to go with the all in one. Too much can go wrong during assembly and you should avoid it if you can.
yup, separating and installing them separately is a pain in the arse, its always better to do it in the one job if you can afford the initial high cost. My LCD panel needs replaced due to light bleeding, but I cant be arsed, the digitiser is likely to fail in the future anyway being an HD2 so ill wait and just do the two of them together.
OK, thank you.
I've watched 2 or 3 "how to change digitizer" videos. Is there a video for changing the lcd+digitizer or its the same as the digitizer change? I have to disassemble the whole phone to change the digitizer...
LexHammer said:
OK, thank you.
I've watched 2 or 3 "how to change digitizer" videos. Is there a video for changing the lcd+digitizer or its the same as the digitizer change? I have to disassemble the whole phone to change the digitizer...
Click to expand...
Click to collapse
there is a vid somewhere, ill have a look later, but essentially yes. you need to remove the whole lot, the only difference between doing them both and doing them separately is that the two panels are stuck to each other, and its that process of separating or putting back together that's really tricky and people have ended up damaging one or the other trying it.
What about the difference in the EU and T-Mobile versions, like in the digitizer (soldering and insertion) Is there a difference too, if i take the whole "pack" (LCD + Digitizer) and what should i look for if there is a difference?
LexHammer said:
What about the difference in the EU and T-Mobile versions, like in the digitizer (soldering and insertion) Is there a difference too, if i take the whole "pack" (LCD + Digitizer) and what should i look for if there is a difference?
Click to expand...
Click to collapse
If you buy combo(LCD+digitizer) there's no problem to replace it to whatever version of HD2 you own: combo is interchangeable on both versions!
OK, Thank you!
I'm asking because i asked some buyers on ebay, and they told me "Sorry, my friend, but this is for T-mobile version" But on the pictures, they are all the same.
I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA
But on a already assembled combo pack (LCD + digitizer) how to know if the digitizer is EU version, beside the T-mobile logo.
hengsheng120 said:
I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA
Click to expand...
Click to collapse
I doubt it's a relationship between digitizer and g-sensor/proximity sensor...
---------- Post added at 02:37 PM ---------- Previous post was at 02:36 PM ----------
LexHammer said:
But on a already assembled combo pack (LCD + digitizer) how to know if the digitizer is EU version, beside the T-mobile logo.
Click to expand...
Click to collapse
There's no way to figure out this...
bib*oops said:
I doubt it's a relationship between digitizer and g-sensor/proximity sensor...
---------- Post added at 02:37 PM ---------- Previous post was at 02:36 PM ----------
There's no way to figure out this...
Click to expand...
Click to collapse
Let me clarify that; my hd2 EU first had its digitizer+LCD replaced with a TMOUS version, and the proximity sensor stopped working,
then the the mobo was replaced by a tmous mobo in the same EU housing and the accelerometer and magnetometer does not work properly (accelerometer works in wm6.5 but not android), but the proximity sensor worked.
It's not just me having a hardware replacement problem, there's a significant amount of posts by other users about replacement parts not working properly. So everyone should be at least very cautious about using them because replacing with other parts may cause other problems.
my buddys HD2's touch screen suddenly stopped working.
he gave me the phone for $50.
i guess ima have to do lil work
I need some help with choosing the combo
Which one should i take and why on one the second item there are those big cable-like things.
N1 - http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
N2 - http://www.ebay.com/itm/NEW-lcd-Tou...ltDomain_0&hash=item3a67e44659#ht_2175wt_1344
Will i need to solder them together or they are already soldered (welded junction or whatever)
Thank you!
Anybody?
LexHammer said:
I need some help with choosing the combo
Which one should i take and why on one the second item there are those big cable-like things.
N1 - http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
N2 - http://www.ebay.com/itm/NEW-lcd-Tou...ltDomain_0&hash=item3a67e44659#ht_2175wt_1344
Will i need to solder them together or they are already soldered (welded junction or whatever)
Thank you!
Click to expand...
Click to collapse
Both versions are OK, but I would choose the first one.
There's no need for soldering(vers. 2): it's more like a packaging thing in order to get it mounted on chassis.
hengsheng120 said:
I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA
Click to expand...
Click to collapse
I guess its because you/they lost the little glasses that connect the display and the sensor.
Its easy to loose them as they fall out after you take the screen from the housing.
I lost them a few seconds ago and think that i know what wont work when i reassemble
@topic
there is generally no problem removing display from touchscrren. just make it hot with a fan or oven ~80°C is okay. and with a flat knive or iron-wire go for the glue.
If you do this you need new glue-tape. Mostly you get this from china very cheap but takes a while.
If your screen is broken now i would recommend to take a combi pack as you have no glueing, no alignment problems and so on.
its not very hard but kills some time and nerves ;D
OK, so lets do a round up, before i make the purcahse, so I'm sure i will make the right choice.
I'm going to buy this one http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
because its already assembled and much easier to use and IT WILL FIX on my EU version of the phone (Not US T-Mobile)
Only YES or NO will be enough
LexHammer said:
OK, so lets do a round up, before i make the purcahse, so I'm sure i will make the right choice.
I'm going to buy this one http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
because its already assembled and much easier to use and IT WILL FIX on my EU version of the phone (Not US T-Mobile)
Only YES or NO will be enough
Click to expand...
Click to collapse
YES
bib*oops said:
YES
Click to expand...
Click to collapse
The Eu-HD2 is soldered isnt it? This version, from the picture, is the pluged version....
Im not sure because if you change the display also the connector type could be irrelevant.
But if this is the screen from Tmous-HD2, i remember that it was a bit bigger? Is it just the housing or also the display?
=>
Dont buy before this is clear!
(i would open my hd2, look what connector type is inside and buy that one just to be sure...)
And some advise: Try to glue the flex cable from the touchscreen(the one that goes under the end call button reallly close to the display)
This could help to improve the life-span of the cable as its not flexed every time you push the button(try when you hold it in your hands by putting the buttons in the frame and push it, if it flexes the cable fix that!!!)
Otherwise the cable will break one day and the wires will disconnect=> typical problem of not responding touchscreen

Xoom no backlight?!?!

Hi all out there,
My xoom has no backlight? in some angle I'm able to see what's on my home screen, but it's all dark, totally unable to work around...
Someone know something about that? You guys around here are my only help. I have no warranty, cause I bought it from US and I'm i Europe....
Greets,
Philip
Interesting, this person here have the same issue http://forum.xda-developers.com/showthread.php?t=1767082
Hmm I still don't think it's a software sided issue but a hardware issue. You could open your XOOM and if there is anything wrong with the connectors, but you will properly have to replace the whole LCD screen. I had a few LCD TV fail on me before and it's generally the back-light that goes first, so it's not that surprising. Hmm another problem is I looked on ebay over here and a new LCD screen or touch digitizer actually costs more than what it's worth.

[Q] Defy CM7.2 Replaced Digitzer now strange malfunction only in lower screen area

Hi XDA,
on my Defy (MB525) I had a broken digitizer. I replaced with a digitzer bought off EBay which went surprisingly fine with the help of a few YouTube-Videos showing it.
Every thing works (including proximity) anyhow a few screen areas (lower left side) where major cracks have been do not work with the new screen. As an example: I have SwiftKey installed (QWERTZ-Layout) and when I press e on it, the keyboard shows w and r (which are adjacent to e). The same goes for the entire row below it. The effect can be reproduced with other applications or keyboards as well, and is pretty annoying.
Question: Is there anything on the software-side where I can fix this or is the replacement digitizer faulty? If the latter is the case, is there any recommended source in Europe?
I appreciate all your answers and suggestions!
Cheers,
frickelbarde
The digitizer in question was faulty.
Don't buy the Chinese stuff, watch for genuine parts. For the Defy there is a polish guy on EBay who sells built-out originals for ~15€. The one I bought worked.
Cheers,
Frickelbarde
Sent from my Cosmo using XDA Premium HD app

[Q] u8800-51 touch screen bottom not responding

u8800-51 touch screen bottom not responding
hi all
i am new and ignorant
(love the xda rules vid)
just bought second hand at&t impulse 4g (u8800-51) , with the bottom half of the screen, not responding to touch.
the top half works
i was told that it happened when the device got dropped.
the picture is good.
got stuck in at&t logo boot loop, and erased back to original on the android rescue screen. and its booting again
tried to reassemble the screen , but no change.
will replacing the glass plus digitizer solve it?
is there a difference between u8800 and u8800-51 screen parts? (or any other hardware for that matter?)
thanks alot
Switching the touch screen (glass) will fix your problem.
In which side do you have the notification led on? Right or left of speaker?
If it is on the right, you probably have the smaller speaker system (that's good to know if you are buying with the frame).
There is no difference in the sockets, however I have seen all Impulse 4G have the Synaptics version (black flex cable), so it would be better if you'd buy that. Some of the eBay sellers are offering the official AT&T touch screen, with the logo on it, so that would be a safe place to buy from.
-EDIT-
Some more things to know:
When they are selling with a frame, you can see it on the picture and they usually mention that somewhere too. If you took the phone open, it's easy to tell if it's big or small by looking whether it looks like this (big speaker).
Blefish said:
Switching the touch screen (glass) will fix your problem.
In which side do you have the notification led on? Right or left of speaker?
If it is on the right, you probably have the smaller speaker system (that's good to know if you are buying with the frame).
There is no difference in the sockets, however I have seen all Impulse 4G have the Synaptics version (black flex cable), so it would be better if you'd buy that. Some of the eBay sellers are offering the official AT&T touch screen, with the logo on it, so that would be a safe place to buy from.
-EDIT-
Some more things to know:
When they are selling with a frame, you can see it on the picture and they usually mention that somewhere too. If you took the phone open, it's easy to tell if it's big or small by looking whether it looks like
thank u so much
after a long study of the different pics of sellers, i remain a confused, because i finally found enough pics
(attached)
to realize that my model always have the black cable u mentioned which comes with a SMALL speaker, while the big speaker always come with the yellow cable, but alas, my device comes with a black cable, but big speaker,
so should i go with cable color + name mentioned (AT&T Impulse 4G) + AT&T logo, (which all calls for a Small speaker) OR , should i go with speaker size (big) ?
regarding my indicator position, it is to thr right when i look from the inner angle (like the photo of the big speaker that u added
Click to expand...
Click to collapse
That's the digitizer only. I don't think it's glass really, but it's easier to say it is.
I replaced mine by taking off the old digitizer from the frame. It came off pretty easily, it just needs some patience to take it apart without breaking it.
If you don't want to mess with glue, I'd suggest this: http://www.ebay.co.uk/itm/Digitizer...356?pt=LH_DefaultDomain_0&hash=item4abfc0011c
It's without the AT&T logo. I cannot guarantee it will fit though, there is always this chance Huawei modified something else between the U8800 and -51.
Blefish said:
That's the digitizer only. I don't think it's glass really, but it's easier to say it is.
I replaced mine by taking off the old digitizer from the frame. It came off pretty easily, it just needs some patience to take it apart without breaking it.
If you don't want to mess with glue, I'd suggest this: http://www.ebay.co.uk/itm/Digitizer...356?pt=LH_DefaultDomain_0&hash=item4abfc0011c
It's without the AT&T logo. I cannot guarantee it will fit though, there is always this chance Huawei modified something else between the U8800 and -51.
Click to expand...
Click to collapse
Takes over 15 days. I guess you can use adhesive tape to stick it.
http://pages.ebay.com/link/?nav=item.view&id=19075902577
Sent from my U8800-51
Dissenters tWellf
Somcom3X said:
Takes over 15 days. I guess you can use adhesive tape to stick it.
( linked reposting banned for me by the forum)
Sent from my U8800-51
Click to expand...
Click to collapse
thanks allot again
the Ebay links leads to:
"This listing (19075902577) has been removed, or this item is not available.
Please check that you've entered the correct item number
Listings that have ended 90 or more days ago will not be available for viewing."
???
Blefish said:
That's the digitizer only. I don't think it's glass really, but it's easier to say it is.
I replaced mine by taking off the old digitizer from the frame. It came off pretty easily, it just needs some patience to take it apart without breaking it.
If you don't want to mess with glue, I'd suggest this:
It's without the AT&T logo. I cannot guarantee it will fit though, there is always this chance Huawei modified something else between the U8800 and -51.
Click to expand...
Click to collapse
thanks Blefish
i prefer not to risk peeling, for breakage, and gluing, for moisture and mess.
i am starting to think that my digitizer was not original, and that is why it failed.
and feels like plastic. i found an original part at cellulardr.com for about 70$ vs. the 10-$15 ebay ones.
so maybe the seller put on impulse 4g, a big earpiece frame, with a yellow cable digitaizer. what a mess!
i attach a pic of big vs small earpieces. i believe the ''big'' is the one with golden terminals.
i think i will get a cheap ebay small earpiece frame with a black cable digitizer (like the original had, i believe) , with a 5$ small earpiece as extra.
god. why do i feel like Sherlock Holmes ?
http://pages.ebay.com/link/?nav=item.view&id=190759025771
This is only with glass.
You can buy a used one for under $70 or an OEM frame with glass. In my op, its not worth to fix.
(Oem->Original equipment manufacturer)
Sent from my U8800-51
Somcom3X said:
http://pages.ebay.com/link/?nav=item.view&id=190759025771
This is only with glass.
You can buy a used one for under $70 or an OEM frame with glass. In my op, its not worth to fix.
(Oem->Original equipment manufacturer)
Sent from my U8800-51
Click to expand...
Click to collapse
thanks
i am sorry - what is not worth fixing ?
yes, i am going to buy a small earpiese frame with black cable plus a small earpiece,
but seeing my old digitizer, i am starting to think (because of the price difference from the original) that all these E-bay so called "glass" , 10-15$ , advertized digitizers ,are actually made of plastic ??
but i will not "invest in an expensive glass before i am happy with the new device.
so far i have not seen used original digitizers.
if i am happy with the device, i might start looking for a"for parts" u8800-51 deal on E-bay
thanks again
hove64 said:
thanks
i am sorry - what is not worth fixing ?
yes, i am going to buy a small earpiese frame with black cable plus a small earpiece,
but seeing my old digitizer, i am starting to think (because of the price difference from the original) that all these E-bay so called "glass" , 10-15$ , advertized digitizers ,are actually made of plastic ??
but i will not "invest in an expensive glass before i am happy with the new device.
so far i have not seen used original digitizers.
if i am happy with the device, i might start looking for a"for parts" u8800-51 deal on E-bay
thanks again
Click to expand...
Click to collapse
The phone is not worth fixing.
Sent from my U8800-51
Somcom3X said:
The phone is not worth fixing.
Sent from my U8800-51
Click to expand...
Click to collapse
i am sorry....why not worth fixing ?
20$ plus a little more work and i have got a working smart phone - no ?
hove64 said:
i am sorry....why not worth fixing ?
20$ plus a little more work and i have got a working smart phone - no ?
Click to expand...
Click to collapse
Yes, but $70 and you have a brand new one. Basically, fixing it is more trouble than selling it.
Sent from my U8800-51
Somcom3X said:
Yes, but $70 and you have a brand new one. Basically, fixing it is more trouble than selling it.
Sent from my U8800-51
Click to expand...
Click to collapse
thanks
the cheapest new impulse 4g i could find cost 150$. i do get your point, but i already invested time and money on it and i can't sell a device that i am not sure of his condition. also its a little bit exciting for me if i manage to make it work.
is there any way to bypass the faulty touch screen ,for sake of testing the phone,
with some external device such as usb\Bluetooth mouse and keyboard ?
hove64 said:
is there any way to bypass the faulty touch screen ,for sake of testing the phone,
with some external device such as usb\Bluetooth mouse and keyboard ?
Click to expand...
Click to collapse
Recovery or adb commands
Sent from my U8800-51
Somcom3X said:
Recovery or adb commands
Sent from my U8800-51
Click to expand...
Click to collapse
thanks
i will check if adb can help

N900P board in N9005 screen assembly

I have a trusty old N900P on which the front glass has cracked and screen is no longer functional, but the unit appears to turn on and boot (i can connect to a pc and it's recognised).
Now I dont want to install an after market screen (the quality and touch is never the same) so was thinking about buying a new unit. I can get a n9005 delivered fairly quickly, but I was hoping I could transplant my old board into the new phone assembly and it would work? what do you think? From what I can see the everything (layout & connectors etc) looks identical internally.
Thanks
I don't see any problems in what you want to do
princeferoz said:
I don't see any problems in what you want to do
Click to expand...
Click to collapse
Yeah, It looked identical. Thanks

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