Cmos not working. Any thoughts?

IZARRA92
IZARRA92 Member Posts: 2 New User
edited March 2024 in 2020 Archives
The cmos is reset on the motherboard. Battery was checked. At start, video output is ok and boot default me to the bios. I turn off and restart. I get no video output.
Seems like the Cmos doesn’t remember.
 I did reset the Cmos on the motherboard with the same result.

Answers

  • ttttt
    ttttt Member Posts: 1,947 Community Aficionado WiFi Icon
    @IZARRA92,
    Can you explain what is "boot default me to bios"?
    The PC won't boot to the OS but the BIOS
    ? It appeared to be something wrong.
    Have you tried to reset BIOS to default?
    Any abnormal beeps during boot up
    ?
  • IZARRA92
    IZARRA92 Member Posts: 2 New User
    The PS 200w was dead and replaced with a 400w ATX platform. After resetting the Cmos, I get the motherboard video working.  Then, I get a bios message asking to repair or not the bios.  I choose repair, the POST works (no beep) and the OS (Win10) starts.  After multiple programs updates, my PC (desktop ACER ATC-120-UC22) works included all shutdowns and reboots. I thought is was a Win-Win-Win! 
    I unplugged the power source to move the tower.
    The next day, I turned the PC on and NOTHING!
    Fans HHD all working, no POST! NO VIDEO! Looks like the Cmos is gone! (I tested the Cmos battery and it was ok).

  • ttttt
    ttttt Member Posts: 1,947 Community Aficionado WiFi Icon
    @IZARRA92,

    So, the new PSU worked perfectly before you moved the tower. I would suggest you to test your memory sticks one by one.