HP Compaq 511 Laptop Doesn’t Boot, Current 0.182A Fault

A HP Compaq 511 laptop, Press the power botton, the current 0.182A, then auto power off, doesn’t boot.

According to the current value, so doubt the power circuit problem, test +3VS, found the voltage is missing. +5VS voltage is normal.

So, check mosfet Q39 control G pole, the GATE_3S_R voltage is 0.24V only, it is not normal. Due to +5VS is normal, so GATE_3S is normal, just check GATE_3S_R circuit....read more