Develop Bugs

[Q] Back light only comes on after replacing LCD and Digitizer

Hello, and I appreciate everyone who has taken a look at this post.
I recently replaced my LCD and Digitizer. A couple of months ago I dropped my phone into the bilge(bottom of a boat) filled with oil. When this happened the digitizer had a crack in the corner and the LCD got flooded with oil, not to mention the phone. I took of the back cover and let the oil drain out. I didn't open up the housing or anything. I soaked up as much oil as possible. Still though, half of the screen was a few shades darker and difficult to read text messages and playing games were out of the question. Everything else was fine, the OS didn't slow down and I saw no signs of rust anywhere.
During the holidays, I got the digitizer and LCD. So I followed the video on youtube from this website on how to take apart the Xperia Play. I replaced the LCD and I used the same adhesive strip over again with the digitizer. Now when I turn on my phone, it vibrates, but the back light comes on periodically for about 2-3 seconds and then turns of. And then a few minutes later the back light will turn on and turn off again. i get no picture from the LCD. I have turned it off and on a few times. Same thing. I have also tried turning it on while holding the power button and random combinations of the other buttons. I plugged it into my pc and when the back light goes off, my computer detects a device but shortly after losses it.
I have read through other threads to see for similar stories. The only thing i can think of is maybe, I damaged the strip of the LCD or i fried my mother board. I just would like to know if it is another problem or if anyone has some good solutions for this.
If anyone can help me, it would be greatly appreciated. I love this phone and this n00b needs some help. Lol.

If it was just oil you dropped it in then the electronics will probably be fine as it is non conductive so the problem probably lies somewhere else. I do many phone repairs, mainly to iPhones, HTC's etc, but I have never done an XP so not too sure on specifics but what you describe would probably be ribbon cable related, either not a perfect connection or slightly damaged. It only takes a slight nick on the ribbon to render it useless. I replaced a digitizer on an HTC sensation once and the phone did exactly the same as what you describe. I took the new one off and put the old cracked one back on and the phone was normal again.
Dunno how much that helps but hope it's of some use
Sent from my R800i using xda app-developers app

White light spot on screen between sim and sd slots on T325

EDIT: Someone please move this post to troubleshooting, this is between my first posts on this forum, sorry.
Hello,
I have an issue with my T325, I have a white light bleed spot that is visible only on white or light pages between the two slim slots (in the middle of the screen but a bit to left). They are not dead pixels, many cheap phones have such a brighter spot.
I bought the tablet brand new 5 months ago, I have warranty for one and a half more years but it takes half a month or more until they see, repair and return the device if I send it in. (I haven't paid for premium service)
The spot appeared about 3 months ago but I told myself that I will not change my otherwise perfect screen for a brighter 0.3cm white spot even if it's a little annoying sometimes ( I had already exchanged two tablets until I got one without dead pixels or dirt inside the screen). I haven't dropped, pushed the screen on that point or did anything that could have damaged it.
However, at the beginning of this month i wiped my screen with a cloth that had something very hard on it and I didn't see and managed to get a deep 1 cm scratch (I can actually hook my nail in it) exactly in the middle of my screen and I didn't have a screen protector (who needs one on a tablet ? ). I am thinking on convincing somehow the service to change the screen because of the light bleeding. The two issues are unrelated, there is only one scratch on the screen clearly from a swiping motion.
Does anyone have an idea on whether the screen is defective or there is some strain in that point ?
Did anyone have a similar issue and managed to solve it ? Should I try sending it in ?

[Q] S4 mini white screen only help please

A few days ago my s4 mini fell in the toilet. I cleaned it put it in rice for 26 hours~ and also dissasembled it and blew the screen with a hair dryer. Now when I power it up it shows the logo s4 mini etc. etc. but instead of the samsung logo with the noise i get a white screen. After a while when it boots up it is still white but I can unlock it i hear the sound etc. Before that white screen i was stuck with a light blue one. Upon plugging in the charger i got solid 5 minute of "fixed" display (grayer colours, broken full brightness etc.). I ran the diagnostics test which is *#0*# I tested the colours and i found the red pixels turned to pink like red and the blue turned to purple. After a while it was quite hot and i lost that window of accessibility as the screen got stuck with a white display as mentioned above. My question is is there anyway to fix this without buying a new screen panel (which costs 85$ for my colour) or the only way is paying for the full service by Samsung?

Hi Costas,
The problem you have is called „ water damage“. All what you have done is not bad except that you shouldn't power it on. But look on the youtube how to handle phone with water damage or to bring it disassambled to some smart phone repair shop who is specialized in fixing the phones with water damege. It's not enough just to dry the components and fire it up becouse the chlor from the water make conections which you can't see by „naked eye“ and there for is washing in other chemicals neccecery to „TRY“ to save your water damaged phone. And even after this threatment there is no garantee that the phone will working as before if water have reached places which are difficult to clean. So, it's not helpful to say anything about your phone esspecially becose you have swiched it on. Succes !
Sent from my GT-N7000 using xda premium

First error, put your phone in rice, really that only works for youtubers.
As boombastical said, you need to remove all remaining conductive and corrosive components that were dissolved in the water

Completely unresponsive touchscreen

Hello all,
I will preface this by saying that this issue is likely a result of water damage. However, my experience has been a bit odd. So someone bumped my chair, spilled water partially on my phone. I immediately removed the case and battery and let the phone sit for a good half hour before examining it. Looked completely dry so I inserted the battery and booted up. Went perfectly fine until the home screen appeared, at which point the screen did not register any touches and I could not interact with the phone. Removed the battery again and reexamined the phone: upon shaking it I found that some water shook free and was immediately worried. Let it dry for another half hour or so, rebooted it, and it worked perfectly for about half an hour, listened to music and such.
While texting, I noticed that there was some worrisome screen flickering going on so I removed the battery again and let it dry for another hour or two. Now I've reattempted to reboot it, but the screen absolutely refuses to respond to touch input. The phone appears to work perfectly fine and there is no damage to the screen I can see, nor does the flickering appear anymore. But touch input is fully unresponsive.
My current plan is to by a replacement digitizer, screen, and frame combo and replace that but I wanted to check in with the forum first to see if anyone has any ideas as to what the problem is and how I might go about verifying that the digitizer is indeed broken.

ericralph said:
Hello all,
I will preface this by saying that this issue is likely a result of water damage. However, my experience has been a bit odd. So someone bumped my chair, spilled water partially on my phone. I immediately removed the case and battery and let the phone sit for a good half hour before examining it. Looked completely dry so I inserted the battery and booted up. Went perfectly fine until the home screen appeared, at which point the screen did not register any touches and I could not interact with the phone. Removed the battery again and reexamined the phone: upon shaking it I found that some water shook free and was immediately worried. Let it dry for another half hour or so, rebooted it, and it worked perfectly for about half an hour, listened to music and such.
While texting, I noticed that there was some worrisome screen flickering going on so I removed the battery again and let it dry for another hour or two. Now I've reattempted to reboot it, but the screen absolutely refuses to respond to touch input. The phone appears to work perfectly fine and there is no damage to the screen I can see, nor does the flickering appear anymore. But touch input is fully unresponsive.
My current plan is to by a replacement digitizer, screen, and frame combo and replace that but I wanted to check in with the forum first to see if anyone has any ideas as to what the problem is and how I might go about verifying that the digitizer is indeed broken.
Click to expand...
Click to collapse
I've personally not known digitizers to go bad from a little water. Usually it's an internal area where the water is getting too. If you're no longer under warranty I'd take the phone apart from the back by taking out the screws and examining it that way. It may be too late for it if it's caused flickering in the screen. It could have weakened it. Am I saying don't buy a digitizer? No that's up to you. Unfortunately since you used it within a few hours of it getting wet I'm not sure. The best thing to do is to at least let it have a chance to dry overnight since the water gets in places that not much air gets to it takes longer to dry. Some have had luck putting the phone in a baggy of dry rice to extract the moisture. I've never had much luck with that method. I've always taken the phone apart as much as I can and then putting rubbing alcohol on the board to seep in where the water may have gotten and then letting it air dry. Make sure not to get it on the screen though. And with any advice like this I take no responsibility if the phone messes up, becomes unusable or turns into a Ferrari

phonepie said:
I've personally not known digitizers to go bad from a little water. Usually it's an internal area where the water is getting too. If you're no longer under warranty I'd take the phone apart from the back by taking out the screws and examining it that way. It may be too late for it if it's caused flickering in the screen. It could have weakened it. Am I saying don't buy a digitizer? No that's up to you. Unfortunately since you used it within a few hours of it getting wet I'm not sure. The best thing to do is to at least let it have a chance to dry overnight since the water gets in places that not much air gets to it takes longer to dry. Some have had luck putting the phone in a baggy of dry rice to extract the moisture. I've never had much luck with that method. I've always taken the phone apart as much as I can and then putting rubbing alcohol on the board to seep in where the water may have gotten and then letting it air dry. Make sure not to get it on the screen though. And with any advice like this I take no responsibility if the phone messes up, becomes unusable or turns into a Ferrari
Click to expand...
Click to collapse
Thanks a ton for the reply. I have essentially come to the same conclusion. It is quite an absurd issue that EVERYTHING appears to function, but the screen is no longer responsive to touch input. I'm going to try and replace the display body (only $50, can return it within 30 days if no luck). My Verizon contract ends in mid July so I just need a phone that can limp to that point or whenever the next Nexus is released.

Well, I managed to replace the screen/digitizer/body (essentially did a transplant of everything) and now my phone is back in reasonable working order. Had some odd issues with screen flickering again so that is worrisome, but the touch screen now works fine. Only issue is that the screen is absolute trash and is washed out, with major light leakage around the bezels (may have gotten some ****ty knockoff from China ).

Ghost touching + Black screen

Dear valued XDA members
Greetings...
My Xiaomi Note 5 screen broke a year ago; I just woke up and found out:
- The screen is flickering
- Ghost touching
- Colored lines appeared
- Eventually everything went into black
Today I decided to repair it... A brand new original screen; so I went to the repair center and the guy changed my screen infront of my eyes.
When I got back to home, ghost touching happened again in a crazy way, I can't use the phone at all, moreover after reboot the screen became black, I can hear sound only.
I am not sure what is causing this, since the screen is new, and the software is fine.
Anybody has a clue what is this?????
I added photos of the broken screen, and a video after it was replaced.
Thanks in advance

Bad cable, connector, or pins not properly seated.
Loose ground. Failed mobo.
Try a hard reboot if you haven't already. Take it back to the tech, they may have a better plan.