Database Users

Screen all white after LCD replaced?

Alright, so I have another 8125 here that had a broken screen. I replaced the LCD but now when I turn it on, it just shows up all white. I thought the phone might have been messed up but it's not, the computer recognizes it fine. Anyone have any ideas with what's going on? Thanks!

Is this in any way related to your other thread? The one where you say you ripped the ribbon cable?
http://forum.xda-developers.com/showthread.php?t=304323

No, this was a different phone, and I got it to work ! yay!

I had a simular problem and found it was a stuck button that caused the screen to go white.

Help screen replacement problem!!!!

Hi guys, i followed all the indictaions on the official videos but i think i broke something! I had an HTC hd2 with a broken digitilizer but the screen worked fine. I bought a screen+digitilzer combo and replaced it but it didnt work.
The screen does not show anything (black screen) but the backlight of it is on!
I tought maybe was a problem of that lcd so i tested the original screen (that was working) and it does the same.
What could be the problem??
Please i need help

come onn, anyone ?

please guys, anyone ??

Sounds like a defective lcd to me. I'd try an RMA asap on getting another unit before your DOA warranty (if the lcd has one) runs out.

it's not the LCD. I had a working LCD but a defective digitizer, i bought the lcd+digitizer replacement and now both screens do the same , just the backlight is on. And before i change the screens the original lcd was working fine.
Could it be because the LCD is not correctly pasted into the chassis ? i really don't know what could it be the problem. The lcd is correctly connected to the mainboard. What could i broke in the process?
Thanks connexion2005 for the help anyways, is nice to see someone finally answered hehe!

zeba5 said:
it's not the LCD. I had a working LCD but a defective digitizer, i bought the lcd+digitizer replacement and now both screens do the same , just the backlight is on. And before i change the screens the original lcd was working fine.
Could it be because the LCD is not correctly pasted into the chassis ? i really don't know what could it be the problem. The lcd is correctly connected to the mainboard. What could i broke in the process?
Thanks connexion2005 for the help anyways, is nice to see someone finally answered hehe!
Click to expand...
Click to collapse
If you were not really gental with the internal parts of the phone, more presisly the ribbons that connect each part to the main board you could have cause micro cracks in the copper strips of the ribbons. Look at the closely with a magnifying. glass if possible.

today i was able to sync it literally with no idea of what i was touching. I also figured that the digitizer works , i was able it dial some numbers. The phone appears to work.
So, Backlight is on, Touch (digitizer) also works, but not showing anything on the LCD.
Could it be a mainboard problem ?? I'm trying to use logic because i don't know anything about cellphones and how do they work in terms of components.
Could it be the ribbon ? I dont think so, i have two screens and both of them do the same (backlight on but not showing anything).
I'm clueless!

Don`t panic. Calm down, watch a demolution tuturial. You probably miss smt. Good luck
But it could be a ribbon...

[Q] is the LCD broken?

Hey guys,
I have a problem. A week ago I dropped my hd2 and the screen was smashed. I took it to the service and they replaced the digitizer. Now, as it turned out the lcd displays badly and the say it has to also be replaced. I know that after the drop the lcd worked fine. Now it looks like this: http://img857.imageshack.us/i/imag0001u.jpg
My question is - is this broken lcd? it has to be removed? or can I do something with it? is it the fault and they've done something wrong?
Thanks for answers.

Read this post by XDA member Facdemol, this post will help you answer your question.

emjakmaciej said:
Hey guys,
I have a problem. A week ago I dropped my hd2 and the screen was smashed. I took it to the service and they replaced the digitizer. Now, as it turned out the lcd displays badly and the say it has to also be replaced. I know that after the drop the lcd worked fine. Now it looks like this: http://img857.imageshack.us/i/imag0001u.jpg
My question is - is this broken lcd? it has to be removed? or can I do something with it? is it the fault and they've done something wrong?
Thanks for answers.
Click to expand...
Click to collapse
Unless they just haven't connected the LCD properly (very unlikely), there's definitely a problem with it... I'm afraid I think it'll have to be replaced.

in turkey if there is a digitizer problem they change the whole screen.

Under the TMOUS warranty they will replace your phone if an issue comes up like that because it's usually just an unlucky roll of the dice if your LCD does that.

because your problem seems to occur after a mechanical shock, i would suspect 2 scenarios.
1. You have a bad connection between the display flex connector and phone's motherboad. This can either be caused by motherboard display connector failure, some small pins on that connector got busted when the phone was either dropped or once the digitizer was changed. I give pretty small chances for this to have happened.
2. If you see a phone lcd stripped down of it's housing, you will notice that on the bottom part of it (or lateral one on some displays) you can see a flex cable coming from the display's glass-like surface to the back of it. It sits pretty tight around one edge of the screen. It connects the TFT matrix to the processing part (column&row controllers) on the back of the display (or on the flex cable/phone motherboard .. ). If a phone is hit from one side, the case and display housing can press hard on this flex cable and break it, or puncture it. In this case, some of the signals needed to drive some specific areas of the tft matrix aren't getting to the matrix itself so you see some lines on the screen (plus color rendering errors). Sometimes, improper manipulation of the screen when assembling back the phone can also cause the problem.
I give more chances to this scenario.
If number 1 could be fixed by a simple phone disassemble and connector checking, number 2 will indeed require a new display as there isn't any way to service that broken flex cable.
My previous posts about display problems tried to focus on "naturally occurring" problems, not ones induced by electric/mechanical shocks. So in this case, my above scenarios will be more suited as likely suspects for your problem.

[Q] White screen

Hello everyone, my hd2 after a fall the screen has turned white but the phone seems to work because 'receives calls.
I tried to put it into bootloader but it always remains white.
With the replacement of Dispay you think I can solve the problem?
Thanks to all

the white screen usually means that the ..screen is not working at all. What you see are the led's that make up the backlight. The LCD panel is not polarizing this light in any way. This is because either the motherboard doesn't supply the proper signals or the display unit (LCM) is not able to process them.
Both this scenarios can happen when you drop the phone. Simply put, you may change the display and still have this problem (if it is motherboard related). At motherboard level, since the qualcomm snapdragon chip is the one that also does video processing, a failure in displaying something on the screen could mean that the chip itself either got damaged or some of it's soldering points to the PCB were broken. This is a end-game scenario.
What you really need to do, is to check out the board with another display in either a service center or whatever place you can borrow one before you actually buy it.

Thank you for your answer, but try a screen before you replace it is impossible for me, I'm forced to buy it, ****!
It would be a risk to heat the solder joints with a micro gas lamp as for the chipset of some laptops?
Or is there another system?
Thank you
Orx

Sell your phone and by a new use one... by the time you figure out what's wrong, you put in just as much as it would be to by a new use one
Sent from my HTC HD2 using XDA App

solved
before selling the cell I had to understand the problem!
I solved the problem, was the logic board connector did not close the flat cable of the display. All this caused by bad positioning of the protective mylar
Thanks to all

What part is to be changed?

Hi Guys,
I recently broke my Galaxy S4 Gt-I9500's screen and it isn't working at all. I just want to know if I could take my phone's screen on my PC. I'm rooted via phh's superuser and installed Mobizen for Samsung. When I connect my phone to pc it shows as removable device from Samsung. Can I get to know what part of phone is broken LCD display or motherboard. It doesn't even blink the notification LED. No screen OR should I restore stock ROM to check if there was a fault in OS. Please help.
Regards,
Agent Divanshu

If your screen doesn't turn on then it is a screen problem.

Why does LED doesn't blink? It's separate or not from screen.

AgentDivanshu said:
Why does LED doesn't blink? It's separate or not from screen.
Click to expand...
Click to collapse
Listen. Think for a moment.
If your motherboard would be broken, do you think the PC would be able to see your phone? Or do you even think the phone would turn on with a broken motherboard?
Does your PC work without a motherboard? I doubt it.

Pwnycorn said:
Listen. Think for a moment.
If your motherboard would be broken, do you think the PC would be able to see your phone? Or do you even think the phone would turn on with a broken motherboard?
Does your PC work without a motherboard? I doubt it.
Click to expand...
Click to collapse
So can I get to know what is a digitizer and di I require it for repairing phone screen or just LCD screen.

AgentDivanshu said:
So can I get to know what is a digitizer and di I require it for repairing phone screen or just LCD screen.
Click to expand...
Click to collapse
You should do more research, otherwise you might buy the wrong thing.
The Samsung Galaxy S4 has a Super AMOLED screen, not an LCD. Completely different things, like day and night.
And digitizer = the actual screen.
The thing you're always touching is just a glass screen, it has nothing to do with the images displayed on your phone. That's why, when the glass cracks, your phone still works.

Be cheaper to buy a used s4

If you're going to replace the digitizer, you should know that getting a complete replacement for the display is a much better option. The digitizer and AMOLED display are bonded together. To separate them requires a lot of heat, a lot of patience, and a very steady hand. One misstep and the AMOLED display will be destroyed.
Cough up the cash for an entire display, or do what @russy23 recommends and purchase a used S4.