Ok. When I yanked off the ribbon on the LCD, I got some gold things attached to the green tape like this:
I just wanted to ask if it was normal for those things to get pulled off. Here's the picture of the LCD and Circuit board after i took off the cable.
Altogether, I just wanted to ask if I'm still able to buy a ribbon cable and replace it. I don't know where the gold things came from. Hopefully, it didn't come from the phone. But if anyone had this problem, please notify me. Because I don't know if a new ribbon cable would still work. Thank you. P.S: Do you know where to buy a new Ribbon cable?
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Resoldering is OK, but reinforcing the connector with a bonding material to prevent the connector from moving is also required.
As for the LCD ribbon cable, there is a horizontal lock down latch, about an inch long. that locked the ribbon to the board. If that latch is cracked, broken or missing, it is game over for the GPS. Yes, the latches can be replaced but it is very tedious.
If the latch is ok, all you need to do is flip the latch up. Slide the ribbon cable into the mating connector, with the gold contacts face down. Slide the ribbon in as far as it will go and using two fingers spaced at either end of the latch, flip the latch down, locking it into place. It will grab the ribbon and make the connection to the board.
I doubt at this point you will ever find a new one but hope is not lost entirely. Since these are not high current cables the possibility exists to solder the one end of a ribbon cable to the board and then attach a dB connector to the cable for interconnection and taking the system apart. This would solve this problem. In fact ribbon cable of different types can be obtained new and this might be a good upgrade to do as most dB connectors are made with Gold flashed pins. The trouble is not many technicians will want to do this for cheap.
Can you take pictures with it? Try to take pictures and then try to download to PC. If it is ok, then the LCD screen may be bad or the Ribbon cable may be misaligned from its connector. Open the camera (a few screws). Lift the pressure plate in the LCD ribbon cable connector gently, and pull out the ribbon cable. Reinsert it and close the pressure plate. If that doesnt help, I suspect the LCD. You may need to replace the LCD.
To replace the screen of the samsung g800, get there appropriate screwdriver and follow the process below;
Remove your back cover, battery, sim and memory card. Remove the
six screws (two at the bottom are covered by rubber stoppers
which are easily removed). You can now remove the battery compartment.
Below you can see the battery cover removed. You now need to
disconnect the circled ribbon connector. It attaches like a plug and
socket. Simply lift the connector up to unplug it.
Lift the circuit board up to reveal another connector. It attaches like the last one. Unplug this
You can now remove the circuit board. Note that the ribbon running
along the right of the circuit board, with the volume buttons at the
end, is lightly stuck down with a tacky glue or double sided tape.
Remove the grey part. Note that the ribbon with the
camera button at the end is stuck down lightly. Next remove the four screws.
Part of the slider can now be removed.
the two rubber stoppers at the top of the phone to reveal two more
screws. Remove the four screws.
Remove the ribbon which is stuck to the black rectangle. It'll just peel back.
Run your plastic tool all the way around the join of the front cover to
Lift the screen away from the phone at the point on the opposite side. The screen is stuck down lightly
with double sided tape.
You should now have the LCD removed.
Turn the LCD screen over and remove all the green tape you see. You now
need to detach a number or ribbons. The ribbon attaches like a
plug and socket. All the other ribbons have a hinge which you need to
flick up to release.
The reason your screen wont work is because there is a problem with the flexi ribbon that connects the screen to the panel of the phone.
To fix the screen, you would have to dismantle the phone and replace the flexi ribbon.
To disassemble your phone, you have to follow the process below;
Get the appropriate screwdriver(Phillips screwdriver, plastic
tool such as a guitar plectrum or credit card.),
Remove your battery cover, your battery, your sim and your memory card,
screws you can see.
Peel back the sticker. You may need
something with a thin, sharp point to peel the sticker back (samsungmobile.com). Two
rubber stoppers need to be levered out to reveal two more
screws that must be removed.
Run your plastic tool along the join of the battery compartment to
separate the phone into two halves. Next you need to
disconnect the ribbon. This attaches like a plug and
socket. Simply lift the connector up, away from the circuit board to
unplug it. Remove the screw by the left. You can now lift the green
circuit board away from the phone. A little force is required.
You should now have the circuit board removed. Note that
a ribbon, will have disconnected when you removed the circuit
board. Again, this attaches like a plug and socket.
Remove the identification sticker. Remove the volume
button which will be loose. The buttons underneath will be
lightly stuck to the side of the phone and need to be peeled away. Lever
off the grey part.
Remove the four screws you
have access to (one is under the ribbon cable).
You should now be able to separate the phone into two parts. Two rubber stoppers need to be levered out to reveal two
screws. Remove these plus the two others screws you see.
Run your credit card around the join of the housing to release it. Once
you have the two parts separated as far as shown below, pull in the upward direction (towards the camera).
Pull the little metal bars in the direction of the camera.
Lever out the camera, speaker and ringer. They'll be stuck
down with double sided tape. Lever out the the screen.
Slide your plastic tool under the green circuit board to release the LCD
You should now have the LCD screen removed,
Turn the screen over. Remove the green tape at the top. Now release the
circled ribbons. To do so, flick the black latches up and then pull each ribbon away.
That is the ribbon that needs replacement.
Reverse the process to reassemble the phone back together.
I just finished disassembly and it wasn't that bad. Take off all four screws around the battery, then carefully but forcefully take the plastic casing off. Then, take the 2 screws on the main circuit board. That will reveal one connection for the ribbon cable, take that off. Under that is the backplate sliding mechanism of the phone. There will be 6 screws on this assembly, one of them under cable the connects to the keyboarb (bottom right). You will have to take off a green tape and also a gold padding to get to this final screw. After that is off, you will see the other half of the ribbon. Take that one off also, just yank it off. Install the new ribbon tape, make sure you don't rip it, and you're set.