What makes you dizzy? The spoken screen! The screen of iPhone 6 is blurry, because it drop in to water before. It won't boot before, and when fix the motherboard, it can boot, and the we found the screen is blurry. For our eyes and nice intentions, we need to fix it.
Firstly, test it with new screen, it
displays normally, so we exclude the problems from motherboard.
Problems happen at screen or flex cable.
According the repair experience, when the
iron sheet at the upper board is solidifying the screw,
the middle screw hole is twisted through. Thus the PCB is damaged and the
screen is blurred. Only one circuit is under the screw, which is the 1.8V power supply of screen. The power is not sent
to screen normally. I presume that this iPhone has the same reason. Observing
under VGA digital microscope, I do not find such a
problem but find that the pin of 1.8V power supply is eroded and turns black,
as shown in picture 6-71 and 72.
Then, use ultrathin blade to scratch the solder pad and socket pins slightly.
Mount some tin and it shines, as shown in picture 6-73.
Finally, we assemble the iPhone and test
it, the screen displays normally, the iPhone 6 can back to normal.
Note:
As those water-damaged iPhones, after they
are fixed, if the peripherals cannot be used, first we have to check whether
each pin is eroded or not, especially the power supply pins.
No comments:
Post a Comment