Start up Gigabyte -H110M-DS2, restart auto power off, replace the two resistors wr34 and WR3, and repair the fault.
Xiaomi 12 water damage failed to be charged. When charging connector was disassembled, traces of water damage were found. After cleaning, the fault was repaired.
Asustek RTX3070 video card was disconnected, so Jump wire problem was solved.
Lenovo E460 laptop turned on the dark screen and began to dismantle the screen. It was found that Capacitor,Short circuit and Fuse around the screen booster chip were burnt out. The Current heating test method was used, and 3V VCC Current heating test was added to the back stage of Fuse. After touching the boost chip, it was hot to remove it. It was found that Short circuit was eliminated, and the screen was delivered directly. The new screen was replaced and the fault was solved.
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iPhone 7 Plus can't make a call. It shows no serviecs. After testing, it is speculated that there is a problem with Accessories. One by one, it is found that there is a problem with the ANT tuner. It will be good to replace it.
Analysis of ASUS NV chipset motherboard auto power off
Xiaomi 161201-aa notebook no booting, the positive pole of 5V Capacitor and the ground are connected with external Connect the power supply source, plug in 19v and standby normally 0.015, press the start key screen booting up.Find a chip to replace, plug in and retest, the voltage has been normal, troubleshooting.
Xiaomi 11 Youth can't be turned on, replace a switch,Fault repair.
Lenovo Xiaoxin air13iwl laptop standby Short circuit. When the current is adjusted to 2V, the current is more than 4a. Under a sticker, there is an Capacitor next to the standby chip pu701, which is directly removed.Normally booting up。Video card driver, fan, all normal, troubleshooting.
