ADLINK MXE-5300 Series - Manual (Page 32)

22 System Description
Pin#1 and Pin#2 of JP1 and remove the jumper, after which the
CMOS will be restored to factory default settings.
Table 2-13: Clear CMOS Jumper
Normal Clear
CAUTION:
As with JP1, shorting Pin#1 and #2 of JP2 will clear the ME
RTC register, however, since this jumper is used by RMA, user
clearance of the ME RTC register may cause unexpected
errors in system behavior.