HELP - No Boot - Fans spin, then computer shuts down, then cycles on and off repeatedly - No BIOS`

Aristotelian

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Jun 21, 2012
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OK, I had a working system until some time today. Celeron G540 with ASROCK H61MV-ITX used as HTPC. I have a stock PSU that came with a cheap case. Now when I attempt to boot fans spin for about 3 seconds, Green and Yellow LEDs flash, then everything shuts down. No BIOS or video output. After shutting down for about five seconds, the fans spontaneously spin and the process repeats.

Any idea what this could be or what to try next? I will try resetting CMOS.
 

Aristotelian

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Jun 21, 2012
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Got it working. I opened it up and noticed a lot of dust on the cooler. I believe it was overheating or sensor was failing to detect airflow. Cleaned out the cooler, gave it some new thermal paste, and it seems to be working now. Mods can mark as solved.