Develop Bugs

Replacing the screen

I have broken screen on my htc desire hd, i have replaced the LCD+digitizer before. i know my way around this phone.
Is it easy to replace just glass screen ?
I cant see how i can seprate them. they are glued in this black glue thingy.
Better buy whole LCD + digitizer?

by.......................g0tmi1k

I need to do the same. Also since dropping the phone my Bluetooth turns on and off but doesn't always connect. (highlights or ticks option , but I'm not getting anything on the top bar). I disconnect and re-connect a few times to get it working
While I have the phone apart is there anything I can do to fix it?
Sent from my Samsung Galaxy S III using Android Revolution HD

I just replaced the glass only on mine. Unfortunately, the touch screen isn't responding. Anyone know where I might have gone wrong??? Everything else seems to work fine!

Probably a Ribbon Cable.
keithfrombm said:
I just replaced the glass only on mine. Unfortunately, the touch screen isn't responding. Anyone know where I might have gone wrong??? Everything else seems to work fine!
Click to expand...
Click to collapse
Try taking it back apart and re-place the ribbon cables back in there seat, they may not be making proper contact. If you replaced the glass without taking it apart you probably un-seated one of the cables. When working on iPhones there is a cable that is only held in place once you close it and put the phone back together.... It's a PITA.

Buy new part and dont replace . Your self its difficult. And its not easy

You can buy a "used" DHD device to replace yours. It'll be cheaper and easier... With a backup on sdcard, your device will be the same !

Faulty screen replacement?

Hi, I am kinda new to this forum and although I tried to find answer first, I didn't find any.
So today I tried to replace LCD screen on my broken Evo 4G (Sprint) and after many tries when I thought that screen doesnt fit I noticed that the metal casing inside isn't native part so I took it out too. Then the new screen fit very correctly. However, when I turned it on, colorful stripes and faulty pixels appeared and I think now, that I may broke the screen somewhere, although I dont see any cracks visually.
Can the experienced ones of you give me an advice if the screen is broken or what may be wrong? I attach the picture of screen when the phone is on.
Thank you in advance

andreasovo said:
Hi, I am kinda new to this forum and although I tried to find answer first, I didn't find any.
So today I tried to replace LCD screen on my broken Evo 4G (Sprint) and after many tries when I thought that screen doesnt fit I noticed that the metal casing inside isn't native part so I took it out too. Then the new screen fit very correctly. However, when I turned it on, colorful stripes and faulty pixels appeared and I think now, that I may broke the screen somewhere, although I dont see any cracks visually.
Can the experienced ones of you give me an advice if the screen is broken or what may be wrong? I attach the picture of screen when the phone is on.
Thank you in advance
Click to expand...
Click to collapse
did you connect it correctly? it looks like you might have damaged the connections, it happens if you didnt lift the little locks up and tried pulling it out
*sorry for the poor vocabulary, i replace screen all the times just not sure what the proper names for the parts are*

I understand what you mean. Does it mean for me that is useless to buy new screen as it would have the same issue or new one sould solve it? I mean if problem is the flex cable or pins on board?
Andreasovo
Sent from my GT-I9100 using xda app-developers app

andreasovo said:
I understand what you mean. Does it mean for me that is useless to buy new screen as it would have the same issue or new one sould solve it? I mean if problem is the flex cable or pins on board?
Andreasovo
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
well if it is the flex cable it, then ordering another screen would solve the problem. but if it is the pins then ordering another one would be pointless. theres also a chance the lcd might be faulty. All the LCDs and digitizers that i buy i get them from Amazon :good: and so far all have worked perfectly.

Sounds like damaged pins on board from not releasing the pin cable latches before removing the cable from the board, in which case the phone is fubar and the only way to repair it is to replace the logic board or the device itself
We are legion, for we are many.
Sent from the DarkSide of the GalaXy with a MEK device

-EViL-KoNCEPTz- said:
Sounds like damaged pins on board from not releasing the pin cable latches before removing the cable from the board, in which case the phone is fubar and the only way to repair it is to replace the logic board or the device itself
We are legion, for we are many.
Sent from the DarkSide of the GalaXy with a MEK device
Click to expand...
Click to collapse
I dont see a way how I can recognize damaged pins as from my view it looks they are OK, but if they are easily damaged from inside, then it might be so. I will possibly try to get new screen cause I might use too much force when putting the last one into it.
Or any other guess?

D855 OEM screen replaced but touch not working

Hello all
I dropped my G3 a few months ago and cracked the screen. Recently got it replaced with a brand new OEM screen.
When I boot the phone, the touch works properly, can navigate the menus, everything. As soon as I turn the screen off, only knock on works but the touch doesn't work. I can't unlock the phone unless I remove the battery and boot again. There's no touch available in TWRP as well.
I'm currently flashing a stock ROM, Android L, hoping that it will solve the problem. If it doesn't, I fear I may have to resort to other methods. If any of you have experienced this, please let me know as to what steps you've taken to remedy it.
Thank you in advance.

sarfaraaz said:
Hello all
I dropped my G3 a few months ago and cracked the screen. Recently got it replaced with a brand new OEM screen.
When I boot the phone, the touch works properly, can navigate the menus, everything. As soon as I turn the screen off, only knock on works but the touch doesn't work. I can't unlock the phone unless I remove the battery and boot again. There's no touch available in TWRP as well.
I'm currently flashing a stock ROM, Android L, hoping that it will solve the problem. If it doesn't, I fear I may have to resort to other methods. If any of you have experienced this, please let me know as to what steps you've taken to remedy it.
Thank you in advance.
Click to expand...
Click to collapse
Did you do it yourself or did you send it in or take it to a repair shop? If you didn't do it yourself, I would take it back and demand they fix it at no extra cost.
If you did it yourself, did you get the screen with the digitizer along with it? Just replacing the screen, on most phones, without getting a digitizer already fused to it means trouble.
Also, if you did it yourself, check all connections. I know with my daughters iPod, I had to replace the screen and it wasn't easy and the first time, all the touch areas didn't work correctly. You also have to be careful that you don't ruin the digitizer when installing the screen.
Also, you have to be real careful of all the connectors and the board. One wrong move and you could tear a cable, crack the main board, etc. I refuse to do any more self maintenance on devices like this. Best to either shell out the cash to have it fixed, or just get a new one. That, or also get extended warranties to cover damage to the device.
Also, did you have it in a case protector? If not, you might want to go get one. Otterbox's are worth the money. Yes, it makes the phone bulkier, but I'd rather pay $40 or so for their protector which really helps.

iBolski said:
Did you do it yourself or did you send it in or take it to a repair shop? If you didn't do it yourself, I would take it back and demand they fix it at no extra cost.
If you did it yourself, did you get the screen with the digitizer along with it? Just replacing the screen, on most phones, without getting a digitizer already fused to it means trouble.
Also, if you did it yourself, check all connections. I know with my daughters iPod, I had to replace the screen and it wasn't easy and the first time, all the touch areas didn't work correctly. You also have to be careful that you don't ruin the digitizer when installing the screen.
Also, you have to be real careful of all the connectors and the board. One wrong move and you could tear a cable, crack the main board, etc. I refuse to do any more self maintenance on devices like this. Best to either shell out the cash to have it fixed, or just get a new one. That, or also get extended warranties to cover damage to the device.
Also, did you have it in a case protector? If not, you might want to go get one. Otterbox's are worth the money. Yes, it makes the phone bulkier, but I'd rather pay $40 or so for their protector which really helps.
Click to expand...
Click to collapse
A friend who's an LG technician did it for me. Replaced the screen and digitizer I believe. He tested it on another G3 and the screen works perfectly. Given that the screen works on another G3, do you think it is likely that this is a software issue and not hardware?
I have a case that came with the phone but I've never used it, however, that's definitely going to change from now on.

sarfaraaz said:
A friend who's an LG technician did it for me. Replaced the screen and digitizer I believe. He tested it on another G3 and the screen works perfectly. Given that the screen works on another G3, do you think it is likely that this is a software issue and not hardware?
I have a case that came with the phone but I've never used it, however, that's definitely going to change from now on.
Click to expand...
Click to collapse
I can't even pretend to know what might be the issue. I would take it back to your friend and ask him to look at it, if not replace it again.

iBolski said:
I can't even pretend to know what might be the issue. I would take it back to your friend and ask him to look at it, if not replace it again.
Click to expand...
Click to collapse
Yeah, he asked me to return it to stock and then test it seeing as his internet speed sucks, and if it still sin't working then he'll take it back to work on it.
Will report back if the software update works or not.

Just an update, flashing to stock didn't work. Only way I can use the phone now is to set the screen to never turn off

sarfaraaz said:
Just an update, flashing to stock didn't work. Only way I can use the phone now is to set the screen to never turn off
Click to expand...
Click to collapse
Have same problem and solved yet.
Just try to double click power button when there is image on screen after that touchscreen is working.

Stopper said:
Have same problem and solved yet.
Just try to double click power button when there is image on screen after that touchscreen is working.
Click to expand...
Click to collapse
I've tried everything, finally figured out that it only works with the quick circle case. If I close the case and wait for the circle to show up then open it, touch works. It's probably something internal that's messed up but I've since given the phone to LG themselves for a quote and possible repair.

sarfaraaz said:
[...] I've since given the phone to LG themselves for a quote and possible repair.
Click to expand...
Click to collapse
Any news since?

Black screen, only backlight works. Everything else is ok.

Hi
Sorry for my english, I'm hungarian, this is the best I can do.
So I bought a cheap (but not too cheap) SM-P905, but I can't get the screen to work properly.
The touch layer, the spen, the backlight works well, I managed to mirror the screen on my pc and everything else seems to be okay.
I got off the back cover, I tried to unplug and reattach every flex cable, even the battery. I tried to look everything under magnifying glass to see what could be the problem.
The lcd flex connector looks like this under my lens.
(Upload it in the next post, not working from the android app)
I tried to clean it with a needle, but it still looks like it is corroded or melted.
Is it possible that replacing this connector will get the screen back to normal? (I found flex connector replacement on the internet)
Or is it possible to repair it with some jumpers or something like this?
Is it melted because of some shorted circuit somewhere else, or because of a bad micro capacitor?
How and where can I locate and resolve this problem (s)? Maybe is it still the lcd that is simply dead and I can't bring it back to life?
I dont want to buy a screen, and a motherboard (neither only one of them )
Thank you for your help!

Okay the forum doesnt let me to insert links or photos, because I'm new here -.-
/s/53oab9sykbihn32/20151021_175009.jpg?dl=0 write dropbox dot com in front of link

https://www.dropbox.com/s/53oab9sykbihn32/20151021_175009.jpg?dl=0
In my opinion it died!!

I hoped for better opinions
I wanted to know how this thing can die?
It has to be caused by something.
Bad resistor/capacitor? Is it on the motherboard or on the lcd's circuitboard?? Or is it only the corroded flex connector??
I dont want to throw the whole tablet in the trash. Everything else is just operating fine.
If nobody can answer this, where should I write, where people can help with these very small components / resoldering / measuring what gone wrong here?

Alan-B said:
In my opinion it died!!
Click to expand...
Click to collapse
So today I measured the pins in worst condition. There are 2 pins that I tought can cause the problem and looks corroded. (Number 5 and 9 from the right) Both of them !are not used!. (There is a total of 3 pins that are not used on the connector/cable)
They are not lead through the flex cable, they have no function here.
So the problem comes from somewhere else, but I still don't know why they look like this.
Maybe I will try to seperate the screen from the body and look at it closer and its connectors/smaller circuit boards.
Sent from my SM-N9005 using XDA Free mobile app

Hmm, that pic does not make me think its a corrosion problem. At best, it can lead to a finicky connection, but there seems to be enough there for proper electrical contact. If this were a headphone jack, for example, I would say apply pressure near the cable to see if the headset works properly, and if it does, then I know its a cable problem. No idea if you can try to apply pressure to the cable and see if the LCD turns on.
If the screen mirrors on the TV successfully, then there are a bunch of Samsung Service Codes you can use to test the LCD. Unfortunately I do not know them for this model, but google should get you the service menu very easily. There is definitely a test in there for the LCD that should give you a better idea what to expect.
If the cable is pretty cheap, I would also just pick up one and try replacing. Nothing to lose! AND if you have access to another identical device, you can try to stick this LCD on that device to see if its the LCD thats the problem or the motherboard.
Lastly, I would want to know if the glass on that LCD has ever been replaced. If they did a glass only replacement, its possible they overheated the LCD ... OR used too much LOCA glue that shorted the connectors.
Many possibilities, so I wouldn't call it a day yet. First, look for the service menu, thats the best place to begin.

I will try the service codes.
Unfortunately I don't have more devices. The easiest way would be to test the identical parts on a working one, but I don't know anyone who would risk his/her tablet for this
The other thing I can do is to get another lcd-glass unit from ebay or from ifixit and try it. If the problem was the lcd, it should work, I'm happy, but if its black, I will have (maybe) 2 working lcd units for sale. Or I have to get a new motherboard (sounds expansive).
I don't think that they replaced the glass on this device, it looks very used and scratchy, so it was working before.
Thank you for taking your time for me and answering my dumb questions!!
Sent from my SM-N9005 using XDA Free mobile app

There are more good news than bad, so I'm very happy.
So 1-2 days ago I started to get off the screen to see if I can seperate the LCD from the receiver. Turned out its not that hard. The only hard thing is to get it off the body in one piece. Lots of heating with a hair drier, and a LOT OF PATIENCE. If you can get it off in one piece you are on your way.
Seperating the glass from the LCD is very easy, did it in 10 minutes, I don't think it needs heating...
So I did it, then I saw some water damage (white things) on the back side of the LCD. There is a small board here too, so I cleaned the white thing off with some alcohol.
Then I put the lcd back and voilá, Its WORKING!!!
The only problem is that I damaged the touch screen glass, so I need to order a new one, but its under 20$ so no problem.
Thank you all for your help, I hope that I finished here
Sent from my SM-N9005 using XDA Free mobile app

Good to know! Thank you for the update

Other solution is remove battery five minute and reconnect battery

Screen Problem

A friend of mine has a problem with his screen, see pics, it very strange and its somehow related to the SoM not the screen - I ve swapped the SoM for the one in my unit and the problem is cured on his unit but mine has it, I swapped them back and mine is fine but his has this problem.
It was on 5.1.1. and I ve tried several versions of 5.1.1. and several versions of 4.4.4. but I always get the same problem.
Any suggestions ?

Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.

typos1 said:
Have I found the cause I wonder ? In the attached pic you can see a splodge of solder on what I m going to guess is the video output controller or something.
Click to expand...
Click to collapse
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.

alukarulz said:
Who would carelessly drip solder into the unit? if it were to drip somewhere vital it would have fried or fry your car wires, even worse catch on fire.
Click to expand...
Click to collapse
Theres no solder anywhere else and I dont think it dripped past the lid and the DVD player leaving no trace, I think someone was working on it for some reason or maybe bad quality control at the factory.

Did removing the solder splash resolve the issue?

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Not done it yet, gonna try later . . .

I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.

Draiden said:
I am interested too I've got the exact same problem. Pumpkin send me a new screen even though I've got no warranty anymore and the problem disappeared. Sadly this new screen is without a flex cable for the touchscreen so commands were not possible.
Click to expand...
Click to collapse
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?

typos1 said:
Yes, but the problem on my friend's unit is not screen related.
Why cant you use the cable from your old screen ?
Click to expand...
Click to collapse
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.

marchnz said:
Did removing the solder splash resolve the issue?
Click to expand...
Click to collapse
Yes, it did !!
Half an hour of holding a soldering iron to a piece of copper braid and rubbing them over the solder/components covered in solder sorted it !
I used an iron that isnt quite hot enough to melt the solder used on these devices and it melted the solder splash easily, suggesting it was household solder or solder left by someone after the unit left the factory.
Still it was an excruciating half an hour - I thought all that heat my damage the SoM and maybe possibly remove components.

Draiden said:
Okay but screen issues are exactly the same.
The new screen has only one flex cable it's working but touch commands are not recognised. And the old screen has two flex cables.
Edit: I don't know if the new screen suffers the same problem because I had it running for only one minute and the screen issues are randomly.
Click to expand...
Click to collapse
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.

Mau2012sim said:
Your old screen assembly is the screen + touchpanel. That is why there are two flexcables. One for the screen, one for the touchpanel. Your new screen assembly is the screen only.
You would have to move the touchpanel from the old to the new screen. However, that could be very difficult when the touchpanel surface is fully glued to the screen surface. If you're lucky the touchpanel is only attached along the edges. Then you might be able to remove it and stick it to the new screen.
Easiest way is to contact Pumpkin and ask them to send you the full assembly, so screen + attached touchpanel.
Click to expand...
Click to collapse
Pumpkin are just sellers, it may be better to contact the factory direct, mighty be cheaper too.

Yes thanks for your answers