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Help! Computer turns on automatically!

S

sco0oby

Limp Gawd
Joined
Jan 1, 2006
Messages
223
Hey, my computer just began turning on automatically today. I went to clean up the wire management and tried turning on my computer. It didn't work. I checked the wire connections 4 times and they were perfectly fine. So i tried turning it on again and no luck :( I checked the wires one more time, and started disconnecting certain fans and hard drives one by one to check what the problem was but it would still boot automatically. Then i turned my I/O switch on the PSU off. After multiple checks, I flipped the I/O switch on and i started to hear this sorta-loud squealing coming from the PSU and it suddenly turns on after that. The monitor, keyboard, and mouse weren't recognized when the computer was on. I checked the wires and even swapped PSUs with my brother. But still the same results with mine. His worked perfectly. However, there was no bad smell or hot objects in my computer. The sound is only made when the 20+4 motherboard connector is plugged in. Someone have ANY suggestions?

MSI K8N-Neo4 // 3500+ Venice w/ AC Freezer 64 Pro
2GB Corsair // Sapphire x800 @ 432/1002
Maxtor 6L1P020 114GB // Maxtor 6L1R020 189GB
19" NEC P1150 // Antec SmartPower 2.0 500W
 
Check your BIOS for a "State after power failure" setting. If it's set to "on" your PC will power on when you turn the I/O switch on the PSU on with the power cord plugged in.
 
i can't even check my BIOS. It doesn't recognize any monitor that's plugged in.
 
Remove everything except processor - HSF, video card - monitor, one stick of ram and keyboard and mouse, and see if it will post. Do both power supplies you tried make that squealing sound?
 
alphanumeric said:
Remove everything except processor - HSF, video card - monitor, one stick of ram and keyboard and mouse, and see if it will post. Do both power supplies you tried make that squealing sound?
Click to expand...

Yeah, any power supply (I have 2 extra cheapo PSUs I tried out) makes that squealing sound with mine. It didn't recognize the monitor, so I can't tell if it posts. Also, I found out that it doesn't turn on using the power switch on the front of the case and that the fans run on highest speeds..
 
I used to have the same problem with my old computer...

It took me over a month to find out what its was.

Try to find the setting in your Bios for your Lan connection and see if the "wake on lan" setting is enabled, if it is turn it off.

If you don't have a high speed internet connection like DSL or cable then this probably is'nt your problem:D

good luck
 
Nova69ssfan said:
I used to have the same problem with my old computer...

It took me over a month to find out what its was.

Try to find the setting in your Bios for your Lan connection and see if the "wake on lan" setting is enabled, if it is turn it off.

If you don't have a high speed internet connection like DSL or cable then this probably is'nt your problem:D

good luck
Click to expand...

The problem with checking the BIOS is that no monitors that I plug in are recognized (they turn on, but act as if they aren't plugged into something).
 
If more than one power supply squeals it is likely being overloaded by a short or bad component in your system. The monitor not being recognized is probably an indication that PC isn't posting. Do you here any beeps when you try to power it up? If I read your first post correctly the original problem was that the PC turned on by itself. That problem can likely be fixed by checking the wake on LAN setting in the BIOS once you can get it to post to a BIOS screen. The second problem started after you moved some of your power cabling in the case. I know you have checked it several times but check it again to make sure none of the cables are chafing against any metal edges in the case. If a wire is touching a sharp edge vibration will eventually case the wires insulation to be cut and the wire will short out to ground. Also if you have that extra 4 wire power cable make sure it is connected to the motherboard. I would remove and re-seat your ram, video card and any extra add in cards you have. Something may have got moved while you were working on your cables. If you still can't get it to post with the bare minimum of components you may have to remove the motherboard from the case, put it on a none conductive surface and try to power it up. If it still won't post then it's likely something got damaged while you were working on it.
 
Thanks a bunch for the help alphanumeric. I don't hear beeps when I try to power it up. It doesn't respond to the power switch at all. I checked it again and all of the cables are neatly separated. The extra 4 wire power cable is connected to the motherboard (always was). Later, I'll remove and separate all of the components and try to power the motherboard alone.

If this gives any help, whenever I work on my computer, I always remove the power cord from the PSU and I press the power switch on the front of the case to ground the computer (powers on for a split second).
 
Ok, so i just took apart my computer and put the mobo (only cpu and HSF connected) on a grounded surface. I attached the 24 pin cable to it and it started making the same noise.
 
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