Laptop brought no boot. because of short circuit on 1.05V line by tossing voltage PCH(HM57) worms up so changed by new one and everything goes OK and we have display. But display comes after 6-7 second so decided to program bios to new version so pick up main bios( 4MB) and programmed it by programmer to new version. after solder BIOS IC , MB powers on but restart continuously. now short circuit found on the MB and strange thing:" when you pick up main bios IC from MB it turns on and remains OK, every voltage produces stable"!!!!!!!! where to dig?

There is an assumption that the BIOS chip is faulty.

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The fish will soon be caught that nibbles at every bait...)

replaced by new one before!