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Acer aspire 5535 (cp2a MB) random boot
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alifakhrniya [ 09 сен 2014, 16:02 ]
Заголовок сообщения:  Acer aspire 5535 (cp2a MB) random boot

Hi friends.
08220
CP2A MB
48.4K901.021

I really confused about this laptop,i have 2 number of this laptop with same problem. sometimes they boot normally and work normally but sometimes do not boot and sink about 0.8A constant current .
i soldered a debug card to debug port u20,the result is this: when system boot up the lpc port is active but when it do not boot the lpc port is inactive too .
I think something cause lpc port goes inactive and system could not boot normally.
wpce773la0dg changed,Bios updated,cpu changed. help please ..

deni219634 [ 13 сен 2014, 20:22 ]
Заголовок сообщения:  Re: Acer aspire 5535 (cp2a MB) random boot

Have you tried to warm up the chipset?

alifakhrniya [ 16 сен 2014, 10:30 ]
Заголовок сообщения:  Re: Acer aspire 5535 (cp2a MB) random boot

Hi,
Reballing of south bridge solved the problem.
I reballed south bridge because inactivation of lpc port between KBC and S.B.
The other thing is this RTC_AUX_S5 feeds only from backup battery and system dose not work without it.

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