Apple Watch S5 does not turn on (capacitor short circuit)

Apple Watch S5 does not turn on (capacitor short circuit)

“Fault model” Apple Watch S5

[Fault phenomenon] No boot.

[Maintenance process] I received a machine sent by a customer for repair, the model is Apple Watch S5, and the fault is that it does not turn on.

Apple Watch S5 does not turn on Figure 1

This watch has been repaired before. When the motherboard was removed, it was found that the battery detection pin of the positive electrode of the battery flew a wire.

Apple Watch S5 does not turn on Figure 2

After re-welding one, turn on the electricity to see the current, and find that the current jumps directly to 800mA. Even if you touch the short circuit with your hands, you can find that there is a hot place because there is glue on the motherboard. We ground the hot area with a grinding pen, and found that a capacitor was short-circuited, which was directly deducted and then powered on.

Apple Watch S5 does not turn on Figure 3

The current returned to normal, and the button screen test turned on normally.

Apple Watch S5 does not turn on Figure 4

[Maintenance result] After the motherboard is put into the shell, the watch can be turned on normally, and the functions of the test watch are normal, so the maintenance is over.