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No video when pc is turned on. Monitor says no signal. I disconnected hard drive and I and finally got the motherboard specs on the monitor. Hooked hd back and finally booted but started to reboot every 3 seconds. Now it's doing the same thing where it won't load and no video. Unhooked hd again and got the same mb specs screen again. Any ideas?

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  • 5,660 Answers

Yeah

Reboot every 3 seconds?

Sounds like a problem with Electrolytic Capacitors, on the motherboard. (Or in the Power Supply)

(Radial Aluminum Electrolytic Capacitors to be more specific)

Capacitors are used as Filters, and Voltage Regulators; on the motherboard. (Electrolytic or Solid Polymer)

The one's used as Voltage Regulators are in the Motherboard Voltage Regulator Circuit.

Part of what the motherboard voltage regulator circuit does, is to regulate voltage for the Processor (CPU)

The Processor MUST have a steady, 'clean', supply of Voltage; and it MUST be kept within the tight voltage tolerance range, for the Processor.
Too little voltage, or too much voltage, and the Processor turns off. (BIOS turns it off)

http://capacitorlab.com/visible-failures/index.htm

http://www.youtube.com/watch?v=Lut7MX5Dd_A

http://www.hardwaresecrets.com/article/616

http://www.hardwaresecrets.com/article/595

http://www.youtube.com/watch?v=KN6_-8fYHo0

(Starts at 0:04)

[FOLLOW Anti-Static Procedures!]

Otherwise the problem is the Power Supply.
Yep. Same Ol' Electrolytic Capacitors, are USUALLY the problem.

For additional questions please post in a Comment.
Regards,
joecoolvette

Posted on Apr 26, 2013

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Posted on Dec 01, 2009

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