Erxiu Apple mobile iPhone 13 does not turn on

Erxiu Apple mobile iPhone 13 does not turn on

Second, repair an iPhone 13 that won’t turn on after a heavy fall. After disassembly, it is found that there is a concave layer on the lower layer of the motherboard. Observe by layers. The specific repair process is as follows:

“Machine model” Apple iPhone 13

[Fault phenomenon] No boot

[Maintenance process] The colleague sent an Apple 13 in a panic, saying that it could have been turned on, but it was just about to change the back cover, and it hasn’t been changed yet. It won’t be turned on after being charged in the store for a while. Let’s find a way to turn on the phone and hurry back to ensure safety.

Apple iPhone 13 does not boot Figure 1

After receiving the phone, you can see that the glass of the back shell of the mobile phone is sunken, which is obviously hit by something, which may hurt the motherboard and cause it not to turn on. Take a look at the motherboard first.

Immediately after the motherboard was removed, it was found that there was a dent in the lower layer of the motherboard. First, it was powered on by a regulated power supply, and the current jumped directly to more than one year. It seems that there is leakage in the motherboard, which should be caused by a chip problem in the lower layer. Observe it directly in layers.

Apple iPhone 13 does not boot Figure 2

Sure enough, a power amplifier chip on the lower floor has cracked, which just corresponds to the groove at the back. Take off the cracked power amplifier chip directly, replace it with a new chip, clamp it up with a test rack, and it is no longer powered on and leaked. Press the power button to take off normally, so you can start it, OK, fit it directly and then install it for testing.

Apple iPhone 13 does not boot Figure 3

[Maintenance result] Install the motherboard into the mobile phone, and start the test. The mobile phone is normally booted into the system, and the functions such as charging, WiFi, voice, compass, vibration and telephone are normal. The maintenance is over here.