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8.14.2. Clear CMOS Jumper (J37)
The "Clear CMOS" jumper (J37) can be used to reset the Real Time Clock (RTC) and drain the RTC well.
The jumper has one position: Pin 1-2 and not mounted (default position). More information on setting the "Clear
CMOS" jumper can be found in the following table.
Table 28: Clear CMOS Jumper Description (J37)
J37 Position
Description
Pin 1-2
X
Clear CMOS RTC content
(Board does not boot with the jumper in this position)
-
Default position
"X" = Jumper set and "-" = jumper not set
Do not leave the jumper in position 1-2, otherwise if the power is disconnected, the battery
will fully deplete within a few weeks.
8.14.3. Load BIOS Default Jumper (J38)
The "Load BIOS Default" jumper (J38) can be used to recover from incorrect BIOS settings. For example, an incorrect
BIOS setting that causes the attached display not to turn on can be erased by this jumper. More information on setting
the "Load BIOS Default" jumper can be found in the following table.
Table 29: Load BIOS Default Jumper Description (J38)
J38 Position
Description
Pin 1-2
X
Loads default BIOS settings and erases the password
(Board does not boot with the jumper in this position)
-
Default position
"X" = Jumper set and "-" = jumper not set
Do not leave the jumper in position 1-2, otherwise the board will always load the factory
default on every power on and is not able to retain any user settings.
To load default BIOS settings and erase password:
1.
Turn off power completely (no +12 V to +24 V supply).
2.
Place the jumper to position 1-2.
3.
Turn on power.
4.
Motherboard beeps fast 20 times and turns off.
5.
Turn off power.
6.
Disconnect the jumper.
7.
Turn on power, use the Power-On button (PWRBTN_IN#) if required to boot.
Motherboard might automatically reboot a few times. Wait until booting is completed.
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mITX-SKL-H – User Guide, Rev.1.1
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