Desktop startup.

[WrathX2]

After a recent lightning storm my PC fried. I had to replace the power supply, motherboard and RAM (wasn't compatible with the new board). Now every time I plug my Desktop into the wall, it auto-starts without me having to press the power button. I have unplugged the front headers and it still starts when the PC without the power switch or reset switches being plugged in. System Specs are listed below.

XFX 790i Ultra Motherboard
Corsair XMS3 DDR3 2048 Dual Channel RAM
EVGA 512MB 8800GT
E2180 Intel Pentium Dual Core (I need to upgrade, I know ><)
CoolerMaster 850Watt PSU
Standard 80GB SATA HDD
Standard Combo ODD

This was happening when I had my old CoolerMaster 850 Watt PSU, I thought it may have been fried by the storm as well, but the new one is doing this too.... Is it a BIOS configuration? I'm not really quite sure what to do at this point. Any help is much appreciated, thank you!

EDIT > I have Windows Vista Home Premium 64-bit OEM version. I have all appropriate CDs and Documentation. I currently have SP1 installed.

[computeruler]

mabye the on switch on your case try a new button

[WrathX2]

I apologize, I am a bit confused by your question. It has nothing to do with the case at all. I said I unplugged all of the front headers. After I unplugged the front headers, I plugged in the PSU to the wall again, and it started up without me having to do anything. Normally when you plug a computer in the wall you MUST press a power button to power the unit. Mine doesn't seem to be doing this. I have since re-enabled the front headers so the power switches work again, but I still have the same problem when I unplug and replug in the case.

[patio]

With the headers unplugged the PSU is in an unswitched position...it will power up when plugged in.

[WrathX2]

Correct, however the problem persists even after I re-enabled the front headers. The actual PSU doesn't have a on/off switch, it is switchless. Before the storm and with my old BFG 680i, I never had this problem...

EDIT > Is it possible that the Case was shot yesterday too and even though the PC recognizes to shutdown and restart when the headers are plugged in, the PSU is not reading it?

Also, is it possible I have the Switches in wrong, I don't know if you need to install them according to a +/- method as there are 2 sides. I don't know if that would cause the problem, even though the PC is still recognizing the buttons for shutdowns and restarts.

[brett74]

do you have wake on lan disabled in bios cause if it's connected to a network it will power up if there's activity on the network.

[WrathX2]

I couldn't find that option, either way it wasn't connected to the network when this started happening this morning because the cable modem fried as well and I had to replace it. So it was doing this while the LAN was disabled. Is it possible that the Motherboard is defective?

[patio]

Yes you need to get the polarity right.
I've seen a power switch act like a reset switch and vica versa and or neither of them work with the polarity backwards.

[ryanbarrier]

My BIOS has a setting that specifies what should the computer do after a power outage.  I believe the default should be "resume last state" which would keep it off if it was off before the outage, and turn it on if it was on before the outage.  You should also be able to change the setting to "Always Stay Off" or "Always Turn On."  Different BIOS manufacturers will have different options, but I know mine has the option and it sounds very much like yours does too.

[WrathX2]

I unplugged the case, reset the polarity on the headers (HDD light started working, but I already figured something was messed up with that using polarity). Reset the memory, reset the CMOS went into the BIOS -> Power Management and there was an option "PWRON after PWR-Fail" I disabled that. It is still happening. I even used a new power cable because someone at my work (CompUSA) said that it could be a messed up ground in the cable. Nothing seems to help, anyone have any more suggestions, and I do want to thank everyone for the help so far! I really appreciate the quick responses =D

[drmsucks]

Do you have the motherboard installed correctly on the standoffs and the mounting screws moderately tight in the proper holes, i.e., could there be a short?

Have you tried replacing the power supply to rule it out?

[WrathX2]

I don't know if I would say "moderately" I think I would just use the word tight. Yes, I have replaced the PSU.

[drmsucks]

I don't know if I would say "moderately" I think I would just use the word tight.

I said moderately because the board can be damaged by overtightening.

[WrathX2]

I don't have them in too tight, the board was doing this before I put it in the case when I tested to see if it would POST.

[WrathX2]

I contacted XFX on this matter, they said the board isn't defective and they believe that it is the surge of power when I plug in the PSU that is causing the board to boot. They said this won't hurt the board in any way shape or form. Thank you all for your help! You've been great =D