Touch not working after replacing flex cable - G2 Q&A, Help & Troubleshooting

Hello,
I have a LG D802 EU unlocked and noticed that it wont charge anymore, so I ordered a replacement flex cable. Sadly, I ordered one for the D801, which I didnt notice at first.
So I replaced the flex cable, it charges again but the problem is that the touchscreen does not work properly anymore (sometimes there are 'ghost touches', so it physically still works).
After a lot of googling, it seems that the problem is that the connector on the right side of the flex is responsible for the screen and is the part that seems to make problems. [Red on the picture]
Another problem is that the one connector on the left side does not fit, as the 'hole' is bigger on the D801 model. [Yellow on the picture]
Is there anything I can do? Maybe using parts from the original flex cable I have, like only the upper things?
I have tried unplugging/replugging the red connector already.
Picture: i.imgur_com/mk3IlDQ.png

Related

NEED Flex cable

Does anyone know where i can buy a flex cable for a touch dual?
not the keypad flex cable, but an actual flex cable connecting the lcd to the main board... mines got damaged from excessive sliding and now the screen sometimes turns black and other times its fine...
Well, I'm selling my Nike so if you were interested you could take the flex cable from that?
See my sig for details.

wizzard wont sync

hey all these days my wizard would sync perfectly but today it jsut charges and doesn't sync i did a hard reset but still don't work .. i tried in a different computer and it doesn't even identify it
anyone have this problem???
had the same problem. all days it worked and then suddenly just charging (no sync, no identification). I also did a hard reset but this changed nothing. then I did not use my wizard quite a while (about 3 months)...tried it again and it worked perfectly fine. i have no idea where the problem was...so mate I have no idea how to solve it but you see...there was a happy end
I just got given a Wizard and it's got this problem too, charging but no sync. Problem with mine looks like a damaged mini USB connector. I can see that the plastic in front of one of the pins on the bottom of the phone is broken.
This thread http://forum.xda-developers.com/showthread.php?t=300240 has some suggestions on where to get replacement connectors.
biofidius said:
I just got given a Wizard and it's got this problem too, charging but no sync. Problem with mine looks like a damaged mini USB connector. I can see that the plastic in front of one of the pins on the bottom of the phone is broken.
This thread http://forum.xda-developers.com/showthread.php?t=300240 has some suggestions on where to get replacement connectors.
Click to expand...
Click to collapse
how easy is to replace this connector.
i have replaced the screen and got all the way down to the MOBO but i didnt see that mini connector.
edit: i meant i did see the connector but its soldered to the MOBO so i was wondering if this can be replaced.
im having the same problem
In the forum link I posted above people have said that you can damage your MOBO easily if the PCB gets too hot when soldering.
I have access to a hot air tool used for SMD components, which lets me heat all the pins on the mini USB connector evenly. Using a soldering iron would be more difficult and increase the chances of damaging the MOBO.

Replacement for HTC incredible PCB Connector

A few month's ago I'd ordered a LCD screen replacement for my incredible, and so when I got back from work o immediately took out the LCD from the package and started taking out my old broken. For me it was my first time experience replacing an LCD phone screen, anyways back to what I was going to say was when I unplugged the connector for the screen and the motherboard itself, after attempt to plug the connectors back together; the display connector plugged in perfect while the connector for the motherboard didn't do so well. The white piece that covers the PCB Connector, it tears a little bit off and I'd tried to power on the phone, meanwhile it didn't I tried again and things got worst. So I search online for a PCB Connector and see one, so I decided to and try to rip off the PCB Connector and plan to order the PCB Connector. So the part to attempt ripping off the PCB Connector didn't go so well, and stop there before things got worst. Any suggestions how I can replace that? I can't just leave my phone in my room and have to cover in dust. I need my phone back, how can I fix these? I know this thread seems long but I tries but it details for you guys.

LG G2 D802 / fried electronic smell / still working but not charging

Just plugged my good old LG G2 D802 32GB to charger that I always used with cable that I always use... and it's not charging.
Unplugged after about a minute and well.. there is that toasted electronic smell from the bottom of the phone...
Phone still works but it has just 10% battery charge so i have switched it off for time being...
Anybody had the same issue? is charging board separate on this phone and just attached to mainboard with ribbon cables? any clues whether swap of charging board from another LG G2 would work? i could probably source phone with broken screen from ebay to use parts... if that makes any sense at all...
if no hope... then maybe it's time I should get myself Q6 or G6 for Xmas... though... till now G2 was doing everything i needed...
The G2 has a separate Micro USB daughter board, yes. It has the big ribbon cables included. But I think most of the charging circuit is on the mainboard.
Does it still connect to a computer, even when not charging? I think the VRMs for power delivery could be indeed on the daughter board.
You can get it quite cheap on ebay, for example here:
https://www.ebay.com/itm/LG-G2-D802...k-Connector-Flex-Ribbon-OEM-Part/171315113072
If it smelled burned, maybe you can detect a burned trace/resistor/transistor on the board, if its on the daughter board, there is a very good chance it will work again after you fixed that
Thanks for the info.
I get "Power surge on USB port" message in Windows when I try to connect it to PC and fried electronic smell immediately returns.
I will try to disassemble phone this weekend and see if there is any obvious damage and where is it located.

Flex charging cable

Hi, i have the following issue with the charging flex board.
Hoping to be clear
1) I have 2 G2, one is working (A) and the other one isn't working (B)
On B the red led is blinking if I plug th phone to the supply charger
2) I swap 2 flexes board
Result: now both G2s are working
Basically A with the flex originally in B (that wasn0t working) now is working
And B is working with the flex originally in A (that already was warking)
3) I partially disonnect the flex ffrom the A (remind, it is working with B flex that at the beginning wasn't working), I place correctly various sensors, I connect again the flex: now it isn't working
If I switch 2 flexes, I have the same behaviour of point 1
It is quite clearly the 2 G2s are working but it seems the flex that originally was in B has some issue... what I'm not able to explain myself is the reason why at the beninnig, the first time I switched 2 flexes, both were working but after partially disconnect and then connect again it wasn't working again.
Someone had some similar experience/suggestions?
Thanks

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