Sign in with
Sign up | Sign in
Your question

Computer Short-Circuiting

Tags:
Last response: in Systems
Share
November 16, 2012 3:56:40 PM

Hey there everyone, I'm having a bit of an issue with my computer.


If this is the wrong section please let me know :p 

The specs are



Only the motherboard was changed to ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 about 4 months ago, as well as adding a second 560 ti. I built this rig roughly 6 months ago and have had no problems.

I recently got my old gaming PC back from a friend I lent it to, and I wanted to remove one of the SLI'd 560's so I could put it inside the older rig.

When I took out the second video card, and tried to power up the new rig, it seemed like a dead computer. There was no response what so ever. After letting it sit for about 5 minutes I tried powering up again and it did; however only for a split second.

I did a bit of googling and the main thing coming up is that the PC is stopping itself from short-circuiting. There's a handful of "tricks" to get the PC working again however none seem to be working for me.

Any tips? One friend of mine said the PSU might have gone bad, but I don't understand how pulling out the video card would cause that.
November 16, 2012 5:19:00 PM

Have you completely disassembled the computer to verify you have no physical shorts and then carefully re-assembling?
m
0
l
November 16, 2012 6:40:22 PM

COLGeek said:
Have you completely disassembled the computer to verify you have no physical shorts and then carefully re-assembling?

I'm going to try that a bit later tonight.

If it IS bad PSU I do have an old 750w that should power my PC until I can afford a new 1000w, just really hoping it won't come to that since I spent a lot of money on the current PSU.
m
0
l
Related resources
November 16, 2012 6:59:47 PM

did you remove the second card while the system was on power ?
m
0
l
November 16, 2012 7:08:21 PM

Many PSUs have self resetting circuit breakers. Your symptoms fit that scenario. It is conceivable that removing the GPU damaged the PCI connector causing a short between two or more of the contacts, or maybe some piece of stray metal found its way where it doesn't belong. How about the screw that held the GPU in place?
m
0
l
November 16, 2012 7:29:34 PM

ram1009 said:
Many PSUs have self resetting circuit breakers. Your symptoms fit that scenario. It is conceivable that removing the GPU damaged the PCI connector causing a short between two or more of the contacts, or maybe some piece of stray metal found its way where it doesn't belong. How about the screw that held the GPU in place?


The screw that held the GPU went straight from the case into my hand, it was no where near the PCI connectors. Is there a way to test if in fact it is the connector?


scout_03 said:
did you remove the second card while the system was on power ?

Nope, it was definitely off. I don't even open my case panel when the PC is powered on.
m
0
l
November 16, 2012 8:36:29 PM

if you put back the second card in the new system with the bridge does the system start and if it does remove the sli driver then try with one card only
m
0
l
November 16, 2012 11:29:41 PM

So I disconnected everything from the PSU and removed a decent amount of the hardware. I did the paperclip test on the PSU and it turned on fine and stayed on the entire duration I had the paper clip in. Does this mean the Issue isn't a busted PSU and instead a short somewhere a long the cable path?


EDIT: So I connected it to the mobo and it did the split second shuton/off thing again. Does that mean the motherboard itself is fried? I still have the CPU and RAM attached, could the short be in one of those two possibly?

EDIT EDIT: So now with just the motherboard connected (didn't connect the CPU power cable) It's going through a power cycle. It turns on for about 3 seconds, off for about 3 seconds, On for about 3 seconds, and so on.

EDIT EDIT EDIT: Okay so now it's running fine with just one specific 560 installed. I only have power running to the CPU, Mobo, and one 560. It's turning on and running fine. The first 560ti I connected also had the PC turning on fine, but the GPU fan was going nuts so I turned it off. I took out that 560 and put the other one in and it worked perfect.

I'm not sure what would cause the GPU fan on that specific 560 to wind up so fast, but at this point I'm going to start installing everything back in one item at a time, trying the power with each hardware.

EDIT EDIT EDIT EDIT: So everything is connected and it's doing the shut off/shut down thing, but if I hold down the power button the PC appears to work fine. However when I have a monitor connected to the video card there's no display whatsoever.

What's going on lol.
m
0
l
November 17, 2012 3:31:38 PM

Bump, still can't get this thing to work correctly :\
m
0
l
November 18, 2012 1:50:04 AM

please dont bump post since it work with one graphic card and when you try the other it stop and the gpu fan run at full speed this graphic could be defective did you try a graphic card in the second slot only
m
0
l
!