Acer Aspire 2920Z Aspire 2420, 2920, 2920Z Service Guide - Page 129

Clearing Password Check and BIOS Recovery This section provide you the standard operating procedures of clearing password and BIOS recovery for Aspire 2920/2920Z/2420. Aspire 2920/2920Z/2420 provide one Hardware Open Gap on main board for clearing password check, and one Hotkey for enabling BIOS Recovery. Clearing Password Check Hardware Open Gap Description Hardware Gap Default Setting Open (Normal) Operation Description Short (Clearing Password Check) HW Gap position on M/B space: Gap name in Aspire 2920/2920Z/2420 is G71 Steps for Clearing BIOS Password Check If users set BIOS Password ( Supervisor Password and/or User Password ) for a security reason, BIOS will ask the password during systems POST or when systems enter to BIOS Setup menu. However, once it is necessary to bypass the password check, users need to short the HW Gap to clear the password by the following steps: q Power Off a system, and remove HDD, AC and Battery from the machine. q Open the back cover of the machine, and find out the HW Gap on M/B as picture. q Use an electric conductivity tool to short the two points of the HW Gap. q Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the system till BIOS POST finish. Then remove the tool from the HW Gap. q Restart system. Press F2 key to enter BIOS Setup menu. q If there is no Password request, BIOS Password is cleared. Otherwise, please follow the steps and try again. NOTE: The steps are only for clearing BIOS Password ( Supervisor Password and User Password ). Chapter 5 119