Based on the layout below, the jumper to reset your BIOS is to the left of the SATA connectors. It should be markes JCMOS1.
Follow these procedures to clear the CMOS data :
1. Remove AC power line.
2. Set the jumper to "Pin 2-3".
3. Wait for at least five seconds.
4. Set the jumper to "Pin 1-2".
5. Power on the AC.
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