GA-B85N Phoenix-WIFI does not trigger, replace IO, 6 pins of BIOS are disconnected from solder joints, fly wires, and the fault is relieved.
HONOR V10 Boot Black Screen. After dismantling the machine, it was found that the line between BTB connector and Capacitor pin was broken, and the fault was repaired after Jump wire.
no booting ble found on the b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, b switch, BXT.
Power-on detection standby is 3V 5V, and the point switch is not triggered. Upon inspection, it is found that 3VSUS_PWRGD is pulled low, and the high level of 1.0VSUS_PWRGD is required first, so that 3VSUS_PWRGD will not be pulled low. After running the line, it is found that there is a disconnection, but the capacitor must be removed to make up for it. Direct flying line, power-on test, perfect lighting machine.
ECS B75H2-M3 no reset power-down restart, directly from the VTT flying line highlights the machine card, troubleshooting.
HUAWEI nova 2 Plus can't be turned on. After dismantling, the battery was found to be bulging, so the battery was replaced and the fault was repaired.
ASUS B85-PRO-GAMER switch auto power off, directly replace the chip, the motherboard runs smoothly, and the repair is over.
The main board short circuit causes the soft breakdown of PQ5303, which leads to the protection of the charging chip BQ24780, resulting in the non-conduction of the protection isolation circuit.
Dismantle PQ5303, then connect PJ5301 node, turn on the power supply, turn on the power supply, the current instantly rises and jumps, and then connect the screen to test the perfect lighting machine.
iPhone 11 Pro Max can't be turned on, mobile phone short-circuit current, replace power amplifier VCC chip, repair the fault.
