Acer aspire 5735z Wistron Cathedral Peak II 48.4J501.001

Led flash (battery orange led) when power button pressed, but doesn't start.

Bios reprogrammed but nothing changes. Cmos battery 3.2 volts.

As a curiosity: if pin 41 of embedded controller is grounded before connect ac adaptor (19v.) and then press power, laptop start to run, but it get stuck on bios screen. (says press f2 to bios setup, but nothing happen wit any fn + 2)

Embedded controller is a KB3310QF-GP and pin 41 and pin 42 are marked as "FOR KBC DEBUG".

Do you know if KB3310QF has internal programmable flash, like ENE KB9012QF?

Thanks for your comments.