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PC starts -> shuts down -> starts -> nothing

by Hrochan / August 11, 2010 9:41 PM PDT

Hello, I have a PC problem over a week now.
I wanted to overclock my CPU, I've done that many times, I even ran with my Pentium DC 5200 2,5ghz on 4ghz (RAM 800->960), with a very little voltage over default. But i was on 2,5ghz over 9 months now.
I overclocked it a little last week (3ghz, RAM from 800 to 820), and it went just fine. I wanted to go higher so i opened the case to clean the cooler. Nothing unusual...

When I plugged the PC back and turned it on, weird thing happened. It just starts - shows nothing on the monitor, doesn't make any beeps - and turns off after approx. 5 seconds. Then after 2sec., it turns back on! But still nothing on the screen, and no more shutting down.
The shutdwn almost reminds me of BIOS saving changes, it also shuts down for a sec, and then turns back on.

I tried BIOS reset, different video card, various positioning of the RAM's to see if anything's wrong, but with no results.

Also when the PC's plugged it makes quiet high-pitched noise, i don't know if it indicates something, perhaps i didn't notice it before...
Can somebody help me with that?

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Limits have been reached...
by Willy / August 11, 2010 10:40 PM PDT

Sorry, but OC'ing makes things difficult. The plain fact you have to keep it well cooled when it was working to maintain the level of OC. Next, you MUST understand, you're stressing the system and placing the components on the upper tier of performance and the weakest link sooner or later fails. Further, you shorten the "life cycle" of those same components.

The high-pitched noise is probably a transformer or capacitor that's about to fail or not having its voltage/amps used in some way or a compromised component, effectively been weaken. You now know the perils of OC'ing.

I suggest you take it apart and verify and inspect, everything on the mtrbd. If you can test installable items, great, if not hope for the best.

tada -----Willy Happy

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tests were fine - it went bad after the cleaning
by Hrochan / August 12, 2010 9:23 PM PDT

Ok i will Happy cooling shouldn't be a problem though, i have thermalright ultra-120 extreme (I used to have same temps on 4ghz that my friend got on default lol), and the weird thing is the computer survived last week's tiny OC for an hour testing, it was the CLEANING what made things bad... I'd feel really dishonored if i broke something Grin

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