TT 94V-0 E326167 motherboard not powering up

[duraven]

Hello! Embedded Software Engineer here, for fun trying to investigate a friend's laptop not powering up problem – first time opening a laptop.

• The physical power button has been broken on the laptop and the friend advised that they needed to poke the area with a pen to get it to start
• Eventually the pen poking stopped working and now the laptop does not power on at all.

I have stripped down the laptop down to the motherboard but I cannot simulate the button press or otherwise see anything happening when the power is applied.
Motherboard model TT 94V-0 E326167 <see image Motherboard model.jpg>
As per https://www.badcaps.net/forum/showthread.php?t=116266 I could not find the schematics for the board.

More pictures of the power area please see: <Power area top view.jpg> and <Power area bottom view.jpg>

I have blindly guessed that to simulate the power button press I need short to short the contacts here – perhaps that is wrong? Please see <Button press.jpg>

I have also noticed a bit of damage around the power circuitry and the (charge applied?) LED missing, perhaps the damage is causing the problem, please see
<damaged area zoomed in.jpg>

I would really appreciate any comments thank you in advance.

[piernov]

Re: TT 94V-0 E326167 motherboard not powering up

https://www.badcaps.net/forum/showthread.php?t=88758

HannStar don't design boards, they manufacture the PCB. "J MV-4" and "94-V0" are not board model numbers, they are generic markings about PCB characteristics.

[lotas]

Re: TT 94V-0 E326167 motherboard not powering up

Motherboard model - 71R-NH4CU6-T810

[SMDFlea]

Re: TT 94V-0 E326167 motherboard not powering up

Schematic https://www.badcaps.net/forum/showthread.php?t=125246

.