HP 15-g092sa / LA-A996p dead

[artois7]

Hi all,

Been a while since I've looked at a broken laptop.

Got a HP 15-g092SA (LA-A996P mobo with AMD A8 CPU) here for a family friend, no signs of life / no power.

No short across the DC jack, but only reading ~~0.7v plugged in so something is shorted.

Can't find a schematic or obvious reference points on the board. Any experience with these? Surface mount CPU, might hit it with some heat and see if reflowing makes a difference.

[piernov]

Re: HP 15-g092sa / LA-A996p dead

Don't mess with the CPU until you've ruled out everything else.
Especially here, if you think that something is shorted in the B+ line, you must find the shorted component, reflowing the CPU won't magically relieve the short.

First make sure that it's not a continuity problem like a broken DCIN jack. (or connector on the motherboard)
Second, check if the actual short is on the VIN or B+ line.
If you don't see any obviously burnt or bad looking component, you'll have to inject a voltage with a PSU to the shorted line (start with 1V) and find the component which is heating up.

Schematics attached, was pretty easy to find on Google…

[mcplslg123]

Re: HP 15-g092sa / LA-A996p dead

This mobo is notorious for 3v regulator fail. So check it first.