Tag repair

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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…

zll
2023-08-04

Smartphone & Pad Repair Guide

Huawei tablet BAH3- W09 can’t connect to WiFi for repair

Open Xinzhizhao software, find a circuit reference of mobile phone motherboard using Hi1102V100, measure the power supply according to the schematic diagram, and replace a WiFi chip, and the fault remains.

zll
2023-05-08

Laptop Repair Guide

Lenovo T430s notebook can’t be started for repair

Lenovo T430s notebook can’t be started for repair Machine model: Lenovo T430s Main board number: LSN-4 UMA 11263-2 Fault phenomenon: The customer described that Lenovo T430s notebook could not be turned on when it was powered on. Lenovo T430s notebook can’t…

zll
2023-05-05

Blog, Smartphone & Pad Repair Guide

OPPO A35 can’t be recharged after water is injected.

Observing the motherboard after disassembling, the corrosion is not serious. When the battery is not installed, plug in the charger for the mobile phone, and measure that the positive voltage of the battery is only 1V, which is obviously low. After replacing the charging IC, the charging current returns to normal.

zll
2023-05-05

Smartphone & Pad Repair Guide

Huawei Mate 30 Pro can’t connect to WiFi repair

WiFi chip has been repaired at home. The power supply of the WiFi chip is normal when it is turned on, so the iron case of the crystal oscillator is directly found. After disassembling it, the crystal oscillator is taken down to measure the ground value of the crystal oscillator, and it is found that the two ground wires of the crystal oscillator are dropped. Find a good 38.4MHz crystal oscillator and put the motherboard back inside the phone.

zll
2023-05-04

Smartphone & Pad Repair Guide

Glory 50 is seriously flooded and can’t start the machine for repair

First of all, the value of the clock is normal, that is, the internal work of the power supply is abnormal, which leads to the lack of power supply, and the CPU cannot work normally, which leads to the failure of starting the machine. After replacing the PM7325 power supply chip in the figure, the starting current is normal, but the screen does not display.

zll
2023-04-25