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Computer won't boot after Overclocking

So today I decided to overclock my CPU. I followed a video tutorial step by step for my ASRock Z77 Extreme4-m. After completing every step in his video, I selected save changes and restart.

Now the computer will not boot up. If I turn it on and touch nothing, it stays at the Motherboard screen (where it says F2 or Delete for BIOS, etc.) but when I click on F2, F11, or anything nothing changes.

If I spam F2 while the computer is starting up it goes to a black screen with only 2 characters at the bottom right (B4, A9, etc.)

I am extremely worried that I screwed something up. Is it possible to fix this? I just built the computer myself a few days ago. How do I know what went wrong?

Please, any help would be appreciated.
4 answers Last reply Best Answer
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  1. Best answer
    use your BIOS reset jumper and go back to default. the fact that it finishes POST and flashes the BIOS screen means nothing broke(yet) hardware wise.
  2. tripledouce said:
    use your BIOS reset jumper and go back to default. the fact that it finishes POST and flashes the BIOS screen means nothing broke(yet) hardware wise.


    I'm sorry, new to this...but where/what is the reset jumper? And how would I use it?
  3. find in motherboard jumper with text CMOS , had 3pin ... 12 for normal and 23 for reset cmos .. if you don't know just try unplug power ac from psu remove battery mobo let @ minute
  4. Just removed the CMOS battery...let it sit out for about fifteen minutes. Now everything is perfectly fine!
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