Clearing Password Check And Bios Recovery; Clearing Password Check - Acer Aspire 8942G Series Service Manual

Clearing Password Check and BIOS Recovery

This section provides you with standard operating procedures for resetting the BIOS password and BIOS
recovery for the Aspire 8942. The Aspire 8942 provides one Hardware Open Gap on the main board for
clearing password check, and one Hotkey for enabling BIOS Recovery.

Clearing Password Check

Hardware Open Gap Description is as follows:
If users set a BIOS Password (Supervisor Password and/or User Password) for security reasons, the BIOS will
prompt for a password during system POST or when the system enters the BIOS Setup menu. If it becomes
necessary to bypass the password check, users need to short the HW Gap to reset the password by
performing the following procedure:
1. Power off the system and unplug the AC and Battery from the machine.
2. Open the Hard Drive and RAM doors.
3. Remove the Hard drive.
4. Remove the mylar as shown in the above figure.
5. Find the appropriate HW Gap on M/B as shown in the picture.
• G1 is the RTC Reset. When asserted, this signal resets register bits in the RTC well. Unless
the CMOS is being cleared (only to be done in the G1 power state), the RTCRST# input must
always be high when all other RTC power planes are on. In the case where the RTC Battery is
dead or missing on the platform, the RTCRST# pin must rise before the RSMRST# pin.
• G2 is the Secondary RTC Reset. This signal resets the manageability register bits in the RTC
well when the TRTC battery is removed. The SRTCRST# input must always be high when all
other RTC power planes are on. In the case where the RTC Battery is dead or missing on the
platform, the SRTCRST# pin must rise before the RSMRST# pin.
6. Use an electric conductivity tool to short the two points of the HW Gap (G1).
Chapter 5
G2
G1
209