Hi guys,
After trolling XDA for about two days, I finally figured out the way to solve my touch glitch issue with my OPO. It had rendered my phone UNUSABLE .
It was not the software(OPO solution) and it was not a grounding issue (solved with tape).
The solution was what causes most electronics to act weird, corrosion from moisture!
It came down to cleaning the flex connector to the digitizer with a soft bristle toothbrush and a small can of DeOxi.
After looking at the phone's design, the digitizer flex connection is right next to the second biggest opening in the phone chassis, the head phone jack.
With my OPO, moisture had migrated from the headphone jack opening and began corroding the very small connections on the digitizer flex connector and its connection point on the motherboard.
Most of the pins were gold colored, about 25% were green and corroded. What was funny was the more I cleaned them off, more of the screen became usable. This is how I knew it was the solution .
I used a small toothpick to get the crust off and scrubbed both ends of the digitizer connection, with the battery detached, as clean as possible with the DeOxi cleaning spray and the soft bristled toothbrush.
The corrosion was tough to remove, taking three separate clean-then-test rotations. I got really good at taking the screws and their annoying rubber caps off FAST!
After cleaning it is now two days later and my phone works AGAIN!
Hopefully, this will help you guys save about $70-80 buying a whole new screen/digitizer set.
Cheers!
I think this should go in General section instead of Q&A.
Anyways,good information,thanks.
Related
Hi,
I have just replaced LCD and digitizer of my HTC raph (first time) and there seems to be some kind of problem. It turns on, but the screen shows nothing just lights up a little bit and there are some stripes visible as if the lcd would be broken, but it's brand new. The stripes changes a bit as i press some buttons or touch the screen so the phone and touchscreen are working - the problem is with LCD.
I don't know if i put all the conducting tape to the places it originaly was. Could that be a problem? I double checked all the connections but still, might be a contacts problem?
Any thoughts on what might cause this?
Also the phone got kind of hot after having it charged for some time, is that normal?
Of course, this may be caused by a bad connection (but rather hard to go wrong slot), but at a distance hard to say something more concrete.
Best to check with the new flex.
Thank you for the answer, i will try changing the main flex.
The flex cables can touch eachother right? Since they're originally covered with conductive tape.
BTW, i also intend to change the lcd + digitizer... my question is:
how to apply the digitzier? lcd and digitizer came separated - do i have to solder/glue or whatever the flex (of lcd & digi.)?
The original was something like sticked together... reminds me on sellotape aka Scotch Tape.
Can you give me a some help?
thanks
The ribbons must be solded together, there's 4 contacts on them and they should not touch eachother.
A little preface. I've repaired numerous phones and have never had a problem like this.
Foward to now: I had a guy come to me with two evo shift 4g's with cracked screens that were working fine just cracked which to me didn't look like a problem. It's litterally 4 connections alltogether but what I have found is that my digitizer will work for a second then stop. Battery pull then it works for a minute and then back to not working. The problem is that it's both of the phones that are acting the same way.
Question: Is this a common problem because I know all my connections are perfect and I'm getting tired of going back through these phones,
Any help is appreciated.
Drroid said:
A little preface. I've repaired numerous phones and have never had a problem like this.
Foward to now: I had a guy come to me with two evo shift 4g's with cracked screens that were working fine just cracked which to me didn't look like a problem. It's litterally 4 connections alltogether but what I have found is that my digitizer will work for a second then stop. Battery pull then it works for a minute and then back to not working. The problem is that it's both of the phones that are acting the same way.
Question: Is this a common problem because I know all my connections are perfect and I'm getting tired of going back through these phones,
Any help is appreciated.
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Click to collapse
Did you replace the Digitizer as an assembly? Meaning the Digitizer, and the LCD. Or did you just replace the Digitizer Screen? Also when you were in there did you make sure and inspect the Flex Cable thoroughly? I have found that even the small breaks in the Flex Cable will cause, weird issues to occur.
prboy1969 said:
Did you replace the Digitizer as an assembly? Meaning the Digitizer, and the LCD. Or did you just replace the Digitizer Screen? Also when you were in there did you make sure and inspect the Flex Cable thoroughly? I have found that even the small breaks in the Flex Cable will cause, weird issues to occur.
Click to expand...
Click to collapse
I replaced just the digitizer as the lcd screen was fine and working properly. I've got a desk magnifier when I take the phones apart and all the connections were seated correctly, ribbon cables were all in the same shape as they came, no tears and scuffs anywhere. This is why im just aggravated because what else could this be?
What your mentiioning points to a Flex Cable issue. But if your sure, then I'm at a loss. Did you make sure and put all the fasteners back in? Did any of the connectors act weird when being reconnected? That sometimes ends in a bent Pin.
TEAM MiK
MikROMs Since 3/13/11
Well the flex cables looked fine when I took it off the back of the lcd. The flex cable had 4 connector spots. One snap on connector to the board and three push to snap connectors (one at the top where the speaker is and two at the bottom).
My thing is that the digitizer for the shift had a peice that you had to bend on top of itself so it would have the correct length to snap into the connector at the top where the speaker is. If never felt good about bending ribbon cables but thats how the ones before this one came and even in the videos they did that. It just makes me wonder if that could be the reason.
Hmmmm... if the Flex Cable was actually bent, instead of gently curved that could possibly cause issues. But it doesn't seem like that is what's going on here. I would check everything again. Especially the Flex Cable, and connections.
prboy1969 said:
Hmmmm... if the Flex Cable was actually bent, instead of gently curved that could possibly cause issues. But it doesn't seem like that is what's going on here. I would check everything again. Especially the Flex Cable, and connections.
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Click to collapse
I'm just fed up with this thing. I just went through it again and I've gotten to the point I'm just gonna buy the phone from my customer and leave it at that. I've never seen a phone give me so much damn trouble. Thanks for all your help!
I was looking back through my notes ( yes I do enough were I have to keep notes ) just now. I found something that might interest you. Had something sort of similar occur a while back. The device was giving me serious headaches. Well I had forgotten to ask how the device was damaged. When I asked the woman how the device was damaged. She explained that it had been dropped on a curb, and then fallen into a puddle. She then dried it out, and bought it to me. I had repaired two phones for her previously. So I never thought to ask how this one was damaged. The thing was being dropped in water, was what ruined it. Caused all kinds of issues I could not resolve. Ended up switching the Mother Board for her. That was the only thing that resolved the issue. So you may want to ask if the device has been dropped in water. But it's not just that easy. Because you then have to deal with Sprint, because in essence it changes the Phones ID .
So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
SOLVED(sorry, I don't know how to change the title)
I just wanted to fill in anyone curious or running into this problem in the future on how I resolved the issue.
So after some time I narrowed the problem down to the second back cover (the one with the camera lens and beneath the Nexus branded cover) making contact with the motherboard. More specifically, compressing the power management IC with its aluminum cover. You want to make sure that chip is laid flush which was a PITA, for me at least, because the headphone jack and earpiece speaker wants to push it up and out. What I did was put the jack in, lay the board on top, then gradually adjusted the jack with tweezers while gently pushing the motherboard down until the board was flush, then placing the earpiece speaker in.
I then placed the second back cover on and tightened the screws until I could feel them just slightly putting pressure on the cover. I can't stress how light this pressure is as it is the key in resolving this issue. To compare it to changing your oil filter on your car; when you can feel the filter make solid contact with the block and you then turn it about another half turn to seal it; it's like that but without that half turn.
Anyway, I hope this helps anyone else unfortunate enough to both break their screen and then have their phone randomly shut down when any pressure is applied after fixing it.
hello
TCGUK said:
So I ended up cracking my screen and installed a replacement last night. Everything seemed fine but I noticed, after putting it back together, that any slight bit of pressure or shock to the top causes my N5 to shut off.
I took it apart again to make sure all of the ribbons were properly connected and to take a second look and everything appears fine. I didn't have this problem prior to the replacement and I was very gentle during the tear down and reassembly so I don't the the CPU or anything on it is damaged. Other than the top being hyper sensitive the phone works perfectly.
Any ideas on what the problem is or could be?
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Click to collapse
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
josedecuba said:
hello where didu buy the screen for your new n5 ? there is any king of intrusion to do it .
thank:good:
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Click to collapse
I bought mine off of eBay and it cost me $150. I could be wrong but it looked like the screen can't be separated from the frame. You might want to keep that in mind when purchasing because there are sellers that sell the screen without a frame. Tearing down the N5 was pretty simple. The hardest part for me was getting the back cover off as there are 4 (two on each side) large clips. If you end up bending the clips any, you can push them back to shape to keep the back from creaking like every Samsung I've ever owned. There's a nice guide on iFixit if you want to look at the process prior to ordering a new part.
I've read from others that you can send your phone into LG and they'll repair the screen for you. When you send it in they'll email a quote to you within a day. The price I keep seeing is $146 and I have no idea what the turn around on that is.
Hi,
Hope somebody can help me. I purchased a second hand oneplus one of which the screen was broken. I purchased a replacement screen and replaced it without any issues. After powering it back up and starting to use it I noticed there was an horizontal band around the middle of the screen not picking up touches. I opened it again and tested the same without the cover (camera lens and flash) and it worked fine. When putting everything back and closing it, the problem reappears. I noticed from looking at the tear downs pictures I was missing a small plastic piece sitting to the right of the connector and above the ear piece. No idea what it's is purpose but it is missing. I've read that some users have grounding issues and maybe this missing piece is important to ensure the connector and flex don't touch other parts of the body.
Anybody knows what the function of this plastic piece is and where I can purchase one. All resellers I found don't sell this piece. Agreed it doesn't look like it could get faulty but in my case I or the previous owner lost it.
Thanks.
Just put some tape where the piece should be and you should be fine.
I have the exact same issue, but my plastic piece isn't missing. Did you manage to solve it?
Hi guys,
I have a Dasaita PX5 unit with Android 8.0 and 4 GB RAM.
I've bought it a few months ago and it was working fine until today the screen just went crazy.
The screen will start touching itself all over and enabling settings, or quitting my GPS software, or activating apps, or flipping through different screens etc.
I've tried to update the system software, update the MCU, and even a factory reset. The crazy screen issue still persist.
Any idea how and why my screen went crazy and how do I resolve it?
Thanks
Here is a short sample of what I meant by going crazy:
https://youtu.be/8ZcIXuc7MEw
I know exactly why and have had the same problem. There is a ribbon cable that comes out of the screen between the glass and LCD for the digitizer, its damaged the screens are so cheaply made the glass is still somewhat sharp and the cable kinks and breaks. . I actually just came on here to post if anyone knew where I could get a replacement besides Aliexpress.....
You should try reconnecting the ribbon cable, else just get yourself a screen replacement from where you bought the headunit.
I had similar issue where bottom part of the touch screen no longer register touches and as time goes by, the whole screen is completely "untouchable".
The root cause is that the ribbon between the unit and the screen panel connect to the mainboard is rubbing against the unit casing's sharp edges causes permanent damage. Fortunately, it is still under warranty and i have got a replacement panel, smoothed the casing edges and place some duct tape before replacing the panel.
BlinkyTrojan said:
You should try reconnecting the ribbon cable, else just get yourself a screen replacement from where you bought the headunit.
I had similar issue where bottom part of the touch screen no longer register touches and as time goes by, the whole screen is completely "untouchable".
The root cause is that the ribbon between the unit and the screen panel connect to the mainboard is rubbing against the unit casing's sharp edges causes permanent damage. Fortunately, it is still under warranty and i have got a replacement panel, smoothed the casing edges and place some duct tape before replacing the panel.
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Click to collapse
I just tried it and it got worst. :S
Someone with the answer?