Hi everyone
I have got a friend hp ProBook 430 g3 laptop which was not turnning on at all, found a short at 19 volt line which was one of the vcore mosfet AON6370 and replaced it with equivalent mosfet, after that i got 19 volt, 5 volt and 3.3 volt in the circuit but the issue persist and it still the board does not turn on.
when connecting charger it shows white light and also blink orange 4 times and then turns off but voltage are present on the board.
I do noticed that i do not have voltage on pin 8 of bios chip and tried reprogramm it several times and still it does not work but strange thing is when i remove bios chip i get 3.3 voltage on bios pin pads now, how can it be ?
The bios chip does not seems to be shorted though.
Would you please help me troubleshoot this ?
Regards
I have got a friend hp ProBook 430 g3 laptop which was not turnning on at all, found a short at 19 volt line which was one of the vcore mosfet AON6370 and replaced it with equivalent mosfet, after that i got 19 volt, 5 volt and 3.3 volt in the circuit but the issue persist and it still the board does not turn on.
when connecting charger it shows white light and also blink orange 4 times and then turns off but voltage are present on the board.
I do noticed that i do not have voltage on pin 8 of bios chip and tried reprogramm it several times and still it does not work but strange thing is when i remove bios chip i get 3.3 voltage on bios pin pads now, how can it be ?
The bios chip does not seems to be shorted though.
Would you please help me troubleshoot this ?
Regards
Comment