Dell Studio XPS 9100 (Mid 2010) - Manual (Page 42)

1. Follow the instructions in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
3. Locate the 3-pin CMOS reset jumper (CLR_CMOS) on the system board (see System Board Components ).
4. Remove the 2-pin jumper plug from pins 2 and 3 and fix it on pins 1 and 2.
5. Wait for approximately five seconds to clear the CMOS setting.
6. Remove the 2-pin jumper plug from pins 1 and 2 and replace it on pins 2 and 3.
7. Replace the computer cover (see Removing the Computer Cover ).
8. Connect your computer and devices to electrical outlets, and turn them on.
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WARNING: The computer must be disconnected from the electrical outlet to clear the CMOS setting.