Analysis and Solution for non-reactive HP computer startup

Question:

HP computer, model dx2000mt, crashes after power-on, and then enters safe mode after normal operation for 30 seconds automatic power-off and power-off, then power-on, display signal light turns green for 1 second then yellow indicates no input signal is detected, the host signal Green indicates normal, but the mouse and keyboard do not have a signal

Fault Cause:

Memory is loaded but not working, so no alarm sound prompts no memory

Solution:

CMOS discharge, memory replugging once, and then re-install the CMOS battery, the machine is normal after restart, enter the bios and reset the time to the current.