ADLINK MXC-4000 Series - Manual (Page 38)

28 System Description
Matrix MXC-4000 Series
User’s Manual
2.5.4 Clear CMOS Button
When encountering the abnormal condition that causes the MXC-
4002D/4011D controller failed to boot, can try to clear the BIOS
content stored in CMOS and restore to the default setting. To clear
CMOS, just press the button and hold on for 1~2 second then
release it. After doing that, the CMOS will restore to the factory
default setting.