Acer Veriton Z291G Service Guide - Page 70

Clearing CMOS You may need to clear the Setup configuration values (CMOS) if the configuration has been corrupted, or if incorrect settings made in the Setup Utility caused error messages to be unreadable. This procedure will clear the BIOS supervisor password as well. Use the CMOS1 jumper to clear the CMOS data. • 1-2 position: Normal operation (default) • 2-3 position: Clear CMOS data To clear the CMOS data: 1. Turn off the power to the computer and all peripherals. 2. Unplug the power cord from the computer. 3. Unplug the network cable and all connected peripheral devices from the computer. 4. Place the computer on a flat, steady surface with the rear cover facing upward. 5. Remove the LCD assembly by following the procedure described on the page 30. 6. Locate the CMOS1 jumper on the mainboard. 7. Remove the jumper block and set it over the 2-3 pins for 20 to 30 seconds. 8. Return the jumper block to its default 1-2 position. 9. Reinstall all assemblies or cables that have previously been removed. 10. Reinstall the LCD assembly, front bezel, side bars and the computer stand. 11. Connect the AC power cord to the system. 12. Press the power button to turn on the computer. 13. During POST, press Delete to access the Setup Utility. 14. Press F9 to load the system default values. 15. Press F10 to save the changes you made and close the Setup Utility. 62 Veriton Z290G AIO Computer Service Guide