Acer Aspire 7540 Service Guide
Page 98
... System board Run "Load Default Settings" in BIOS Setup Utility. Unlock external keyboard Run "Load Default Settings" in BIOS Setup Utility. Check the drive is dead - "Load Default Settings" in BIOS Setup Utility See "External Diskette Drive Check" on page 86. RTC battery Run BIOS Setup Utility to reconfigure system time...
... System board Run "Load Default Settings" in BIOS Setup Utility. Unlock external keyboard Run "Load Default Settings" in BIOS Setup Utility. Check the drive is dead - "Load Default Settings" in BIOS Setup Utility See "External Diskette Drive Check" on page 86. RTC battery Run BIOS Setup Utility to reconfigure system time...