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Solved: Short-circuit causes iPhone 6 cannot boot

A customer complaints that when press iPhone 6 power button, it has no response. In a word, the iPhone 6 won't boot.  Let's check it and solve it.

Connect it to DC power supply,  the iPhone 6 shows large short circuit.  Disassemble the iPhone with phone opening tools,  we find that the flash position is hot, so we tear it down and find the solder pad is burned a hole. As shown in picture 9-6-1.

PP_VCC_MAIN is short circuit, but it turns normally after removing L1605 inductance, however, the other end of L1605 to U1602 flash chip is still short circuit, so we directly dig from the burning hole till it's not short.

There are 2 useful wire below the hole after we dig it: one is from U1602 flash chip E3 pin RCAM_TO_LEDDRV_STROBE_EN  to iPhone rear camera 30 pin; the other is from CPU to transposon interrupt signal ALS_TO_AP_INT_L  of J1111.

Solder the 2 wire with jumper wires, and apply the green oil to solidify it.

Then we repair the iPhone solder pad and fill the flash chip.

Finally, assemble the iPhone and boot it, now it's going to boot up.  After enter IOS, test all functions, all is fine. The iPhone 6 has been repaired!



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