Very Odd PC power behaviour

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sw1

sw1

sw1

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Basingstoke
Hi All,

Was wondering if someone could help me with a very odd power issues I'm having.

First sympton

1) If I have my PC unplugged, when I plugged in power it need's about 5 mins before it will power up. It's very odd like a dynamo effect you can see the fans starting and LED';s going on then it powers off after about 1/2 sec, does this a few times then when it appears charged it powers on. This started about 3 months ago and previoulsy the build had been fine.

2) When I shut down the PC is turns itself back on after about 2 minutes of being off, this sympton has only just started.

My first thoughts were a CMOS issue as it sometimes reset the bios back to defaults.

My 2nd was the Power supply may be on it's way out, if I was overloading the power in the machine surely it would power off during peak use. At first I thought it was due to my PSU only being 500w but I'm sure these symptons wouldn't happen as it seems fine once it up and running.

My spec is as follows

Abit aw9d-max
Thermal take 500w Power supply ATX 2.0
BFG OC 8800 GTX
Creative Fatality Soundcard
Intel q6600 GO
4 * Sata hard drives using hardware raid
2 * CD rom
4 * Geil 1GB DDR2
 
very weird.. My first thought was PSU not holding the charge but the powering on suggests it's problems with the motherboard. Can you swap the PSU out for another?
 
Not without buying a new PSU.

The Motherboard is only 10 months old so that would be a shame

I agree this could be the problem as it's odd how it keep defaulting back to the Bios defaults. Typical it could be the most problematic part to get out ;o))

Think I'm going to take the whole things to bits and put it back together, make sure there are no strange problems.

I'm dreading getting the GTX out, I had to scrape it into the chassis ;o))
 
sw1 said:
2) When I shut down the PC is turns itself back on after about 2 minutes of being off, this sympton has only just started.
Click to expand...

My PC had this problem once, and I think it was a "Wake on LAN" setting that had to disabled in the BIOS.
 
Cool, the only problem is surely Wake On LAN should only work when it's detects a Link up event on the NIC.

Will give this a go as a first shot though ;o))
 
I don't know, I have a BT Homehub and don't really know too much about networks, but it did sort it out. I know that when I turn my PC off, power remainsto the LAN.
 
Tried disabling power on NIC settings and a I thought no different.

Looks like it may be the motherboard ;o(((

And my copy of CoD 4 has just arrived DAMMMMMMMMMMMMMM
 
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