Second, the touch panel keyboard of Apple MacBook A1707 notebook can't be used. It was directly installed on the machine for measurement. When the problem was found, the interface voltage was wrong, so the interface was directly changed, tested again, and troubleshooting was carried out.
HP Notebook Docking Station Repair
HUAWEI P40 Pro speaker has no sound. Replace the same tail plug board and fix the fault.
Gigabyte GA-Z87P-D3 did not reset and restarted after power failure. The power supply line was replaced and the BIOS was brushed. The boot test was normal.
The TPN-Q214 notebook can't be turned on when it is flooded with water, and the current is directly 0.15. There is a short circuit in this case, so it is suspected that there is a problem with the chip, so just disassemble it and try another one. Let's see if it's the same on the 8th generation machine. It's a 5V=7F [model RT3612C]. It seems that it can be exchanged with each other, replaced, troubleshooting, and maintenance is over here.
HONOR 60 cannot be charged after entering water. Clean up many places where the motherboard is corroded by water, replace the fast charging IC, and repair the fault.
Lenovo IB250MH did not trigger, and the fault of the soldered crystal oscillator remained, so a 32.768 crystal oscillator was found from the stock plate, and the waveform was normal after replacement, and the fault was repaired.
Dell 15-5547 notebook does not respond when pressing the switch, and the small inductance next to the small battery is 0 to the ground; One of the nearby capacitors is a little black and has a small crack. After turning off the capacitor, I found another capacitor to repair it
HUAWEI nova 9 Pro shows no service, the power amplifier chip is virtually soldered off, manual welder is made again, and the fault is repaired.
