HELP : PC turn itself on !!??

  • Thread starter Thread starter John7
  • Start date Start date
J

John7

Hi,

I have weird problem.
After upgrading a flawlessly working system
it now powers itself up after just being shut down.

When I shut down by menu or power button
the system turns off. Everthing comes to a halt = OK.
After 10 seconds the pc powers up and boots ;-)


Tried this without success:
===================
- cleared CMOS
- bios safe, optimized and customized settings
- stripped system down to m/b, cpu, 1 ram, vga, raid HD's
- w/ and w/o Win98SE MS Shutdown supplement
- ran cpu at 1800MHz (FSB @ 100MHz).
- unplugged network cable
- unplugged CD-rom and CD-writer
- disconnected front power switch

Any clues ?

TIA,
John7



System setup (* denotes new parts)
==========
*AMD XP 2400+, plus fan
GA 7DXR+ m/b rev1.0, BIOS F9,
ALL auto power up settings Off.
AC back option Off.
Top performance Off
256MB DDR333
*256MB DDR333 (added)
*Tyan ATi9500pro 128MB AGP8x
*2x Maxtor 80GB 7200 rpm ATA133 as RAID0 (stripe array)
10/100Mb Network card with VIACOM chip.
Pinnacle FireWire1393 card
300W psu
Windows 98SE
Std Logitec Sroll mouse
Std keyboard.
 
Hi,

I have weird problem.
After upgrading a flawlessly working system
it now powers itself up after just being shut down.

When I shut down by menu or power button
the system turns off. Everthing comes to a halt = OK.
After 10 seconds the pc powers up and boots ;-)
Click to expand...

Shooting in the dark here... do you have you machine set up to start
up from mouse or keyboard input? Could be small small vibration
jarring the mouse enough to cause input. Other than that, maybe a
wonky switching power supply?

Sorry I can't be of more help....

Villain
 
what have you set the power button function to> soft off or power off?
(Cnrl panel / power options) wake on lan, or modem activated? Are you
powering 'off' the power strip? Power "on" after power outage enabled?
(CMOS)
 
Thx for responding,

To clarify, system is Powered Off, not suspended or in standby.

Power button set to Soft Off.
AC back system: Off
Turned all Wake Up on Modem / LAN / RealTimeClock off but at no avail.
Unplugged mouse and keyboard but the system still powered up by itself.

When shutting down from:
- Windows using Start Menu - Shut Down or
- Windows touching the Soft Power Front Switch
the system ALWAYS powers up again.

When shutting down from:
- Bios - Q-flash - F10 or
- F8-bootmenu then holding front soft power switch 4 sec.
the system NEVER powers up again.

I tried Win98SE Shutdown Supplement but at no avail.
So Windows has something to do with it, but what?


John7
 
Roger Squires said:
The problem is your power supply. Buy a new P4-ready unit 400w or
better and your booting problem will disappear.

rms
Click to expand...

Roger,
Could you elaborate on that? Why would you go in that direction? Just
interested.....Since a P4 system isn't that demanding compared to a, lets
say,, an AMD high end prossessor system.


I think its the 'soft off' option chosen for the power button. Not that it
should be doing what its doing, but its related, imo. Possible short in the
power circuit of the MB, modding anything J7?

Also what about ANY PM in the bios? everything disabled? ASPI get loaded
properly? Check adaptec's site for the latest drivers.

Jump into - alt.comp.hardware.pc-homebuilt - and ask there, more likely
to find somebody with the same board
 
300W psu
Roger,
Could you elaborate on that?
Click to expand...

I had precisely the same problem with an old 300w on my nf7-s board,
fixed with a new antec. Who knows what the exact issue is, but I'll bet
anything the 300w he has in there now is 5years old at least. You want a
'P4-ready' psu because it comes with the extra 12v motherboard connector,
which I've discussed before is essential in an overclocked system.

rms
 
Ahhh you know i saw that 1800@100 but since it didn't sound too far out of
specs i figured it was stock.
I guess the PSU could be any age he doesn't say.

<'P4-ready' psu because it comes with the extra 12v motherboard connector

Yeah and the 12v dongle is a requirement now it seems, i don't see any
more MB's with the 'easy connect' molex connector anymore.

Thnks 4 responding
 
Have seen this after adding certain hardware to a machine. What was the
upgrade you performed (after which the problem occurred)? Have you tried
undoing the upgrade and seeing if it goes back to working normally?

Paul
 
So to answer my earlier question, what was the upgrade you performed and
does it work OK if you go back (for testing purposes)? If you haven't
changed the PSU and it was working fine previously, its unlikely to be that
(unless you've added a whole lot of current sucking devices in the upgrade).

Paul
 
I just enountered this on an old PIII it ended up the floppy drive.......u
could actually hear it pull down the PSU when activated
 
Verify that windows isn't set to reboot, I have seen many people do that
also I have seen some install programs screw up and leave stuff in that
keeps rebooting windows.
 
make sure bios does not have wake by pme enabled. not sure where that would
be on yours, but on mine its in integrated periph section
 
Dave M said:
make sure bios does not have wake by pme enabled. not sure where that would
be on yours, but on mine its in integrated periph section
Click to expand...


Isn't starting up again on shutdown one of the symptoms of the MSBlaster
worm?

patrickp
 
Most likely you have a wakeup feature enabled in your motherboards bios.
look around the bios and disable, wake on lan and anything that says wakeup
on it. look under your periphs, and power option in your bios. Please look
at you motherboard manual before doing this, for i dont want you to ruin
anything.
 
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