1, PU5 (ISL6269 power control chip for memory), if damaged, the led will light when press power button, but can not boot, or does not display, diagnostic card code C1, or blue screen, or often auto reboot, or black screen with alarm.
2, PQ16 mosfet, if damaged, will auto reboot when boot, or blue screen and system halted.
3, PQ17 mosfet, if damaged, will system halted or reboot, or auto power off from protection circuit.
4, PC42 Filter capacitor, if damaged, will system halted or reboot, or can not boot....read more
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