The GIGABYTE RTX3080 crashed into the system, and after dealing with the over-hole (wire plug + tin paste), the card tested fine.
Acer 4736ZG plugged in VGA and lost power. It was found that VGA and screen were connected via PCIE bus, and four 470UF capacitors were replaced. This time, the screen was installed and plugged in VGA test, and the fault was fixed here.
CAT S61 cannot be turned on, soldered a new battery holder and the fault was fixed.
Lenovo H81M does not turn on, take off the U40, the fault remains, so the target locked C453, take off C453 voltage nor
Take over a HP TPN-q194 fault machine, which is in good appearance. First of all, the HP machine is recommended to be repaired with the original adapter, and there will be some inexplicable failures with the adapter.
[maintenance process]
Xiaomi 10 Youth cannot be turned, charges after activating the battery, the phone is hot, disassembled and silicon grease is applied and the fault is fixed.
The motherboard of Huawei MateBook 14 notebook is corroded, and the capacitor foot is badly corroded. After being removed, it is measured to be about 300NF and replaced with a 10NF notebook. When plugged in, it is turned on directly, and the BIOS interface appears on the screen, which makes the machine light up perfectly.
HUAWEI P40 Pro slow charging, fast power consumption, smoked rosin found the camera power supply chip is damaged, replace the camera power supply chip, the fault is fixed.
First change BQ24781 charging chip, replace the power plugged in no standby, detection found that disconnect the main power supply of the graphics card 19V, it can be triggered normally. Find the point of failure, again the graphics card side of the problem.
