The CMOS is powered by an on-board coin cell battery. Clearing CMOS results in permanent erasure of previous system settings and sets them back to original (factory) system settings.
step:
(1) Turn off the computer and disconnect the power supply;
(2) Use a jumper cap to short-circuit JCOMS1 pins 2-3 for 5~10 seconds, and then restore to the default settings 1-2;
(3) Start the computer, press the key during startup to enter the BIOS settings, and reload the optimal default values;
(4) Save and exit settings
