CMOS Clear

JBT1 on the A4SAN-H/-E/-L-WOHS motherboard is used to clear CMOS, which will also clear any passwords. Instead of pins, this jumper consists of contact pads to prevent accidentally clearing the contents of CMOS.

For a detailed diagram of the A4SAN-H/-E/-L-WOHS motherboard, see the layout under Motherboard Quick Reference.

  1. First power down the system and unplug the power cord(s).

  2. Remove the cover of the chassis to access the motherboard.

  3. Remove the onboard battery from the motherboard.

  4. Short the CMOS pads, JBT1, with a metal object such as a small screwdriver for at least four seconds.

    Note: Clearing CMOS will also clear all passwords.

  5. Remove the screwdriver (or shorting device).

  6. Replace the cover, reconnect the power cord(s), and power on the system.