Acer TravelMate 4220 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 31

5. Peel off the black tape near the DIMM slot to expose the SW1 dip switch. 6. Locate the G41 pin. 7. Short the G41 pin to clear all system passwords. 8. Reinstall the memory modules and the lower case cover. 9. Turn on the computer and press F2 during bootup to access the Setup Utility. 10. Press F9 to load the system defaults. 11. Press F10 to save the changes you made and close the Setup Utility. To clear a lost HDD password: It uses on dos environment. To decode HDD password error code for unlock hard disk. 1. Open the computer in a DOS environment. 2. Type the following command: A\> unlock6 XXXXX 00 3. Press Enter to display the command options. 4. Select option 2 (upper case ASCII code), then press Enter. 5. Write down the generated master password. 6. Reboot the computer. 7. In the HDD password prompt, type the master password generated in step 4, then press Enter. Chapter 2 21