Laptop powers on, screen is black, fans spin, but no POST. Diagnosis: Corrupted BIOS due to failed flash or CMOS battery death.
The "Exclusive" BIOS for the Acer Aspire 5749 is a modified version of the official firmware. While the official BIOS from Acer locks advanced features to prevent users from accidentally misconfiguring the system, the "Exclusive" version unlocks these hidden menus. acer aspire 5749 bios exclusive