Discharging the CMOS clears all user settings. 1. Disassemble the notebook and take out the Mainboard. See Removing the Mainboard on page 69. 2. Remove the RTC battery. See Removing the RTC Battery on page 73. 3. Turn the mainboard over, lift up the DIMM protective cover, and short the G3 pad. 4. Reconnect the RTC battery and reassemble the unit.