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No Power?

By jeffcrenshaw ·
This is an intermittent problem, so I have had great difficulty troubleshooting...

Occasionally when I shut my computer down, when I try to boot it, nothing happens - no POST beep, no fans, it's like it's unplugged. Sometimes if I turn off the powerstrip, wait a few minutes, and turn it back on again, then start the computer it works, sometimes not. At first I thought it was a faulty ATX power switch, but this is the second computer it has happened on (different powerstrip as well). I have looked through the Power Management settings in Windows (XP Pro) as well as the BIOS, and I can't see anything relevant. Here's what I'm running now, but like I said, it has happened on other computers:

Antec Sonata case w/ 380 watt TruePower P/S
Asus A7V333 Motherboard
Athlon XP 3000+ CPU
512 MB RAM
80 Gig HD
Plextor DVD burner

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by TheChas In reply to No Power?

2 things to check:

Enter BIOS setup and MANUALLY set the CPU speed.

Move ANY case or power supply fans to different fan connectors than the ones near the CPU.

Chas

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by jeffcrenshaw In reply to

Poster rated this answer.

The CPU Speed was already set manually, and none of the chassis fans are near the CPU - there is only one and it is connected to the P/S not a pin on the M/B

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by hardach In reply to No Power?

It may seem obvious But I suggest you check the connection from you power supply to the motherboard. Your problem sounds like a bad connection either on the board connector, or in the power supply itself, (Dry solder joint)Be very careful if you decide to open the power supply as high voltages are present for a long time after the power is switched off.

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by DouglasB In reply to No Power?

See if you need a 12volt connector from the power supply to your motherboard. If you do and it is not connected this will cause the exact problem you are describing. Sometimes it gets enough juice to boot, most of the time it does not.

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