iPhone4 Logic Board Replacement and Decomposition Method 6 steps
yossys12345
It is a method of disassembly that is helpful in case of a submerged failure that does not turn on the iPhone4, does not start, or is underused.
[iPhone4 Logic Board Replacement STEP 1]
Logic board is the most complex part of the iPhone, so if you are not confident in the disassembly, we recommend that you consult a repair shop.
If the power is no longer turned on, does not start, or is submerged, it may be necessary to disassemble it because logic board repair may be necessary.
In this decomposition method, I think that you can refer to it because I have done the removal of the logic board.
We have omitted the intermediate decomposition process, but the decomposition method of iPhone4 is published on a separate page, so please confirm it there.
[iPhone4 Logic Board Replacement STEP 2]
The battery could be removed. Battery replacement method is available on a separate page.
[iPhone4 Logic Board Replacement STEP 3]
I was able to remove the rear camera. The rear camera exchange method is available on a separate page.
The image is to remove the SIM card of the iPhone4.
You can remove each sim tray just by inserting the pin attached with the accessory into the hole at the time of iPhone purchase.
If you do not remove the shim tray, the logic board will get caught, so be sure to remove it.
[iPhone4 Logic Board Replacement STEP 6]
Only the logic board was able to be removed.
Logic boards are very delicate parts, so be careful when handling them.
As an aside, if the touch of the liquid crystal does not work at all, i suspect the failure of the liquid crystal most, but if the symptoms do not improve even if the liquid crystal is replaced, the touch IC chip attached to the logic board is broken, so repair is necessary.
