Won't turn off, or cold boot

Asus / Some nlx form factor
January 22, 2009 at 20:33:39
Specs: M0n0wall, Intel Pentium II 333MHz
I got this odd problem with a mini slimline computer of
mine. It almost seems like a hardware problem, but want
to confirm it. It does it even without a hard drive

Ok, here it goes. When it's first plugged in, it stays off
like it should. Then you press power. No post, just
"powers" up. Press RESET, and "beep", does it's POST and
continues along it's merry way.

Now, here's the funny part. It will not shut off no matter
WHAT you try. In Windows, Linux, or any other OS, going
to Shut Down is no different than selecting reboot. It just
looks like a shutdown, but goes to POST all over again.
So, I try holding down the power button. Turns off, power
LED goes out for ONE second, comes back on, and POST's
again and reboots.

I'm at a loss. I tried to update the BIOS, but it told me the
BIOS is up to date, and wouldn't allow me to re-flash it for
the sake of trying it.

Overall, when it boots up, it's fine. Stress tests pass.

Considering it runs M0n0wall and is my main router, this
is a blessing, it'll come right back (except the failure to
cold boot). But, it's an annoyance, because when this
computer is retired to a guest computer, I'd like it to be
able to shut down without pulling the plug.

See More: Wont turn off, or cold boot

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January 22, 2009 at 21:48:30
See if you can find out which motherboard model number.


Can you get into BIOS? If so, try disabling "wake on lan" or all "wake on" functions.


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January 23, 2009 at 02:36:25
Just cracked it open, it's a P2E-N...

No wake on features enabled.

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January 23, 2009 at 09:04:20
Here's the manual...


Starting on page 48 are various settings concerning power up of the board. I can only suggest you try everything since you state the BIOS revision is up to date.

I assume that means you have the latest version. Still, I'd check that you have the latest.


I'm not familiar with m0n0wall. Is there anything in that system that can cause this? I'd be interested if the same problem occurs with W2K, NT, or Win9x.


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