Acer Aspire V3-531-571

[dspok]

Hello is anybody kind enough to help me to short out my problem.
Machine turns on but no display, I found there is no voltage in PL22.

There is no PU11 and PL17 by factory defaults.
I suspect PU13 but sure.

Thanks in advance.

[dspok]

Re: Acer Aspire V3-531-571

Or please let how much voltage should PL22 should have.

[piernov]

Re: Acer Aspire V3-531-571

Do you have +CPU_CORE?

[dspok]

Re: Acer Aspire V3-531-571

Do you have +CPU_CORE?

Yes, +CPU_CORE is ok.
I changed PU13 but no effect.

[piernov]

Re: Acer Aspire V3-531-571

Then the BIOS POST probably fails. Try with another RAM stick, check if the CPU is good and compatible with this board. You can try to flash BIOS if you want too.
I don't think the issue is on the +VGFX_CORE line, the CPU just doesn't tell it to come up. You should still check for a full short to ground on +VGFX_CORE. Warning: this is a CPU power line, a few ohms (even 1 ohm) is not a short if the CPU is plugged in. A short would be really close to 0.

[dspok]

Re: Acer Aspire V3-531-571

@piernov
Thank you for suggestions
But I have already changed CPU, RAM, and there is no short.
Also reprogrammed main BIOS but can anybody upload working main as well as ec BIOS?

[on/off]

Re: Acer Aspire V3-531-571

here you go:

https://www.badcaps.net/forum/showth...light=LA-7912p

[dspok]

Re: Acer Aspire V3-531-571

Reprogramming both EC and MAIN BIOS doesn't help either.