Computer turns on by itself after shutdown

[Gig-O-Ram]

The computer I built for my mother is turning itself on a while after shutdown.

I had the computer at my place for testing and tweaking, and never had this issue, but now it is hooked up at my mother's place for her to use, and it now turns itself on. This has happened two or three times. Everything is plugged into an old basic power strip (not one made with computers in mind). I googled this issue and found stuff about checking the BIOS power mgmt settings, which may be an issue even though I thought the BIOS was good to go.

What could be causing this, and what should I check for? Has anyone ever had this problem?

Specs:
Win XP Pro SP2
Celeron 2.13ghz
512MB RAM
ASUS P4-GX
40GB HDD
400W PSU

[Capper]

theres a setting in the BIOS, should be under the Poer or system Health menu, where you can tell the system what to do after a shut down, i always set mine to stay powered off

[Gig-O-Ram]

Originally Posted by Capper

theres a setting in the BIOS, should be under the Poer or system Health menu, where you can tell the system what to do after a shut down, i always set mine to stay powered off

Yeah, I think I have mine set that way...because I don't have this problem, LOL!

But I guess I may have missed something when checking the BIOS settings the first time around. I guess I'll be making another trip to her place to check it out. Ah, but not today, because she's coming here to celebrate New Years eve, so it'll have to wait. In the mean time, I told her to shut off her power strip.

[JazzyJake]

try resetting your bios.
i was having troubles in my folks cheap-o biostar board with the same problem
reset the bios and BAM problem fixed = ]

even tho i set it to do what i told it to do, it wasn't registering i guess, needed a dope-slap

[Blondie]

Originally Posted by Capper

theres a setting in the BIOS, should be under the Power or system Health menu, where you can tell the system what to do after a shut down, i always set mine to stay powered off

Could also be that the mouse or keyboard is set to wake the computer. One person's modem was turning the computer on IIRC. Are you sure she's shutting it down and not putting it into hybernation?

Do you have specs?

[Quakindude]

In the Bios, look for a Wake on LAN setting. This has caused this "problem" for a lot of my buddies when they try overclocking for the first time and they change a bunch of crap. Or like Blondie said, Wake on Mouse or Keyboard could be enabled. Look under the Power Management Setup area of the Bios.

[Gig-O-Ram]

Well, I went to her place and checked her system, and I found one setting that was labeled "wake on PCI card" or something like that and disabled it, and now the problem is apparently solved. I have a modem card in one of the PCI slots, and I think she may have been getting errant signals or something through her phone line, causing the system to power up. She still has dial up, and I've been trying to convince her to go broadband, so web pages and any online actions don't take minutes to load, but who knows if she will?

As far as specs, please check my first post.

[Lead Head]

Originally Posted by Gig-O-Ram

Well, I went to her place and checked her system, and I found one setting that was labeled "wake on PCI card" or something like that and disabled it, and now the problem is apparently solved. I have a modem card in one of the PCI slots, and I think she may have been getting errant signals or something through her phone line, causing the system to power up. She still has dial up, and I've been trying to convince her to go broadband, so web pages and any online actions don't take minutes to load, but who knows if she will?

As far as specs, please check my first post.

Some BIOSes have an option Called Wake on Ring, or something, if the modem picks up a ring signal (or something like it, could even just be a surge or static). It will tell the PC to power up...

[wtcnbrwndo4u]

Wake on LAN... I don't understand how it works...

[Hitman]

Originally Posted by wtcnbrwndo4u

Wake on LAN... I don't understand how it works...

It's so you can turn a computer on remotely over a LAN. It's generally used by LAN Administrators.

Unless you have a specific use for it, its advised that you disable this feature on your home computers. Hackers have been known to exploit this feature.

Here is the Wikki