ASUS K53SV on off itsel

[jasko_jacker]

Hi all,
I have 3 motherboard with same problem, I got this repair after a year because they handed me a card with the same problems
1 - if I plug in the ac the fan goes on and off, leds remain on, after a few time the leds goes off and the cycle is repeated. If I try a pwr on/off with button the system goes off and goes on
2 - only with battery , fan goes on off , leds remain on , but the system does not turn off

- when the temperature rises, the fan increases but runs unevenly.
- when system start by itself the cpu, gpu and hm65 are hot
-all three motherboards had a problem with the ac jack

I have tried on one motherboard:
change hm65
change ite ec
desolder gpu
reprogram bios

someone have fix this issue ?
thanks

[meritosari]

Re: ASUS K53SV on off itsel

maybe you must check tantalum caps for cpu core

[jasko_jacker]

Re: ASUS K53SV on off itsel

It's possible to verify the tantalium caps without remove them ?
or it's possible to verify only if there is a short

[highpulse]

Re: ASUS K53SV on off itsel

well , for short onboard will beimpossible , since CPU will make them (like if there were a short) bether to test outside , but this on off thing its like if there was no CPU. could be a bad vcore

[jasko_jacker]

Re: ASUS K53SV on off itsel

unfortunately, the vcore voltage is stable.
I check all Voltage & Signal Measure Point TOP and BOTTOM indicated in a boardview. I noticed, however, when working with the battery does not restart.
I think the fault is derived from a short on the power pin, because all three board had a problem of this type.
it's really hard to find this fault.

[degutji]

Re: ASUS K53SV on off itsel

Replace a new GPU ( in my opinion )

Working on Asus K42JA till today from last week, symptom is when plug in adapter, all indicator on for a few 2nd and off but the fan still on with high RPM ( without pressing any button). Try every possible with no luck, after replaced a GPU chip it working like a normal but with black screen / no display ( replace with GPU from scrap MB ). Conclusion for a while it's GPU defect, in my case still black screen even put known good GPU ( still confuse till I send this post ), stuck on this case, i'm out of idea . But in your case just replace a GPU chip for sure

[jasko_jacker]

Re: ASUS K53SV on off itsel

In another board I remove the gpu but nothingh change.
When I insert the power adaptor, all led are on, gpu, cpu and hm65 are hot , after a few seconds the board goes off and the cycle restart.
Power button don't work
With battery , all led are on, gpu, cpu and hm65 are hot and the board remain on and the power button work but the fan runs in spurts

[senso]

Re: ASUS K53SV on off itsel

Try this factory Asus Bios, be warned that your Windows 8 key will be erased, so take a note of it before flashing or you will need to call Microsoft to activate your Windows 8.

[robrock1]

Re: ASUS K53SV on off itsel

I have the same problem, i resoldered EC, i suspect broken trace or components. Pwgood suspend all signals ok. Any ideas?