M81-X Series User’s Manual
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5.15. CMOS Memory Clear Header “JP3”
It is a 3-Pin header that if your system can not boot-up because you forgot your
password or the CMOS setting need to be reset to default values after the system
BIOS has been updated.
The following instructions can be performed to clear the CMOS and password.
Turn off your system power.
Place a jumper cap to short Pin 2 and Pin 3 of JP1 for 3~5 seconds.
Put the jumper cap back to Pin 1 and Pin 2 of JP1.
Turn on your system power then access BIOS setup, please refer to BIOS configuration
illustrations.
5.16. Flash BIOS Lock/Unlock “JP4” ( This item is optional )
It is a 2-Pin header that support Flash BIOS Lock/Unlock function.
Flash BIOS is stored on an Erasable Programmable Read Only Memory (EPROM)
chip. This means that you can erase the current BIOS and flashing a new BIOS, you
must set JP4 to Unlock. After the new BIOS is installed, set JP4 to Lock so that the
BIOS cannot be erased by accident.
Jumper Cap
Function
Short Pin 1-2 Normal Operation
Short Pin 2-3
Clear CMOS
1
3
