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 ..

Have you tried to warm up the chipset?

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.