Acer Aspire 5750_5755G NO DISPLAY

[jeewantha]

Acer Aspire 5750_5755G NO DISPLAY

MOTHER BOARD
P5WE0 LA-6901P
Rev2.0

PROBLEM NO DISPLAY.

I CHECKED ALL VOLTEGES .
ONLY +VGFX_CORE NOT PRESENT.
I CHANGED DRIVER IC, MOSFET, BUT STILL SAME.
ANYONE CAN YOU HELP TO FIX THIS PROBLEM?

[mon2]

Re: Acer Aspire 5750_5755G NO DISPLAY

Remove all power -> meter in resistance mode.

Check the resistance to ground of this power rail that is not being enabled (+VGFX_CORE).

What is the exact resistance?

[piernov]

Re: Acer Aspire 5750_5755G NO DISPLAY

https://logi.wiki/index.php/User:Pie..._I_solve_it.3F

[jeewantha]

Re: Acer Aspire 5750_5755G NO DISPLAY

Remove all power -> meter in resistance mode.

Check the resistance to ground of this power rail that is not being enabled (+VGFX_CORE).

What is the exact resistance?

9.3 Ohms

[G33RT]

Re: Acer Aspire 5750_5755G NO DISPLAY

Any news on this repair ?
I have exactly the same problem !
ACER Board: Q5WV1 LA-7912P

All voltages are present except +VGFX_CORE
Controller chip is 95836H gives no output on UGATE1G and LGATE1G that drives both mosfets for +VGFX_CORE

No shorts detected.

[mcplslg123]

Re: Acer Aspire 5750_5755G NO DISPLAY

Sometimes bios flash solves it,sometimes replacing the PWM 95836 helps along with Both the mosfets. Sometimes its even the replacement of cpu that works. So no definite answers. be careful with the heat as this board's pcb doesnt take heat very well.

[adhiea7x]

Re: Acer Aspire 5750_5755G NO DISPLAY

same case, How with this case? solved or not?