Acer Aspire 3935 Acer Aspire 3965 Series Service Guide - Page 71

Troubleshooting Chapter 4 This chapter describes the procedures for performing a BIOS recovery, clearing the BIOS pasword and unlocking the HDD. It also lists the POST error indicators and BIOS beep codes, as well general troubleshooting instructions. Clearing a BIOS Password To clear a lost BIOS password (user or supervisor password) you need to short the G26 hardware gap located near the HDD connector. H/W Gap G26 Default Setting Open (normal) Function Short to clear the user and supervisor passwords. To clear a BIOS password: 1. Turn off the computer and unplug all the peripherals connected to it. 2. Unplug the power cord from the computer. 3. Remove the battery pack according to the instructions described on page 30. 4. Remove the lower case cover according to the instructions described on page 31. 5. Locate the G26 gap. It is between the HDD connector and the south bridge chip 6. Use an electrical conductivity tool to short the two contacts on the hardware gap together. 7. While resting the tool on the two contacts, plug one end of the AC adapter into the DC-in jack and plug one end to an electrical outlet. 8. Press the power button to turn on the system. 9. After the BIOS POST, remove the tool from the hardware gap. 10. Reinstall the HDD module, battery pack, and the lower case cover. 11. Turn on the computer and press F2 during bootup to access the Setup Utility. 12. Press F9 to load the system defaults. 13. Press F10 to save the changes you made and close the Setup Utility. Acer Aspire 3935 Service Guide 63