: Leave the battery disconnected for at least 10–15 minutes .
Open the bottom plate of the Toughbook to locate the . Disconnect it for 10–15 minutes before reconnecting. panasonic cf53 bios password reset free
Locate the small coin-shaped battery (often wrapped in yellow or blue plastic with two wires) and unplug its connector from the motherboard. : Leave the battery disconnected for at least
If the CMOS reset fails, you may be able to use a master password. panasonic cf53 bios password reset free