PC Boots up only after CMOS reset

By szlose ยท 8 replies
Apr 25, 2015
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  1. So the problem is quite simple and yet very strange.

    Every time I turn off my PC, it wont turn on again until I press reset CMOS button on the motherboard.
    What WILL happen before I decide to press the button is this:
    1. I press power button.
    2. PSU turns on for half a second.
    3. Some click sound happens.
    4. PC turns off.

    The whole process is repeated infinitely.

    The computer is about 2 years old and this problem hasnt occured before. Also I didnt make any changes prior to this problem.

    note1: after I press reset cmos button, the pc works perfectly once is boots up... I can (if I want to) make changes to bios even and it will work. It only has problem to turn on from "powered off" position.
    note2: I will add detailed specs if needed but I really dont think its neccessary.
    note3: I dont make any changes to bios after I reset it using the button.
  2. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,244   +234

    The power supply might be failing...
  3. szlose

    szlose TS Rookie Topic Starter

    I honestly doubt it. The PSU is Corsair 760W (one of the better quality ones) and I bought it 6 months ago.

    But is there any way to rule it out? Other than buying other psu ofc
  4. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,244   +234

    CMOS battery dead?
  5. szlose

    szlose TS Rookie Topic Starter

    I used a battery from other PC and nothing changed. I will buy a new battery tomorrow.

    However, does it really make sense that battery can cause this?
  6. mailpup

    mailpup TS Special Forces Posts: 7,182   +469

    Any power supply can fail, even good brands. That's why there is a warranty period. Do you have access to another power supply to test with?
    Last edited: Apr 27, 2015
  7. szlose

    szlose TS Rookie Topic Starter

    I can ask around so I will definitely check this out AFTER I buy a new battery for the motherboard.
  8. szlose

    szlose TS Rookie Topic Starter

    SOLVED (at least for now)
    I got a battery from another factory new motherboard :)D) and it fixed the issue.
    TLDR Brand new battery == win.

    ps. its weird how ive never hard to replace battery in computers that ive used way longer than this one...
  9. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,244   +234

    The motherboard may have been laying on a shelf for a long time before being sold

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