There is a coin batter y inside the tough book. remove this and hold the power button in for 60 seconds to discharge the capacitors, the cmos memory should be cleared.
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== Update ==
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[image|149225]
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remove the RTC battery and the main battery, then unplug you computer and depress the power button for 30-60 seconds this should reset the cmos there are also posts locates at ic 61, 63 shorting these will perform a cmos reset as well.
There is a coin batter y inside the tough book. remove this and hold the power button in for 60 seconds to discharge the capacitors, the cmos memory should be cleared.