When I got all of these parts I put it all together and hooked it all up. When I pressed the power button the system would power up for less than a second then shut down instantly even though the power LED would stay lit when the power was on. I tested my power supply with another computer and it was working just fine. I assumed the mobo was the problem and so I had RMA'd it.
Newegg then notified me that my mobo was no longer in stock so I wouldn't be able to find the same replacement. I had ordered a different mobo.
I had received it yesterday and went about hooking up the computer again. This time when I powered up everything worked. I unplugged everything and moved the tower to a spot nearby my desk. I plugged everything in again and was able to successfully install Windows. I installed the graphics card and installed mobo/graphics drivers and everything was working great.
I then proceed to disconnect the tower and move my desktop to the "final" position and hook it all up again and BAM! Same problem as before. Computer will power up for half a second then instantly turn off.
Edit: It was plugged into the same outlet.
Can someone help me diagnose my problem? Is it possibly the motherboard again? I will be happy to help any way I can.
If you took it somewhere else and assembled it and it worked there, its not the CPU. Certainly sounds like a power issue. What's different between where you were and where you are now? Are you sure the wall plug works? Are you trying to use some ancient battery backup?
This sounds like either the wall outlet you are plugging into is bad, or the breaker in your basement that the outlet is running to. Same rig, same PSU, and it works in one outlet but not the other. doesnt seem right. You have plenty of juice for your system, so its not an overage issue, and quite frankly, i agree with beenthere as 2 bad mobos is highly unlikely, but not out of the question. My suggestion, move it back to the other outlet, and check it out. If it powers up, you know its not your computer, its your outlet/breaker.
Perhaps I worded my initial information incorrectly. I assembled it in one place, turned it on to test and it worked. I moved it to a place nearby my desk and tested it again and installed windows etc. Then when I finally put the desktop into its "final" position and hooked it up it wouldn't power on. It WORKED and then STOPPED WORKING while in the same outlet.
When I get home from work today I will double check all of my connections and try different wall outlets. I will also reseat the RAM and vid card. Will leave an update as soon as I can.
If the PC still doesn't power on I will go buy a new PSU from BestBuy and see if the problem still persists. BestBuy will let me return the PSU if that isn't the problem so I will be able to get a refund.
Thanks for everyone's help thus far. I really appreciate it. If anyone else has any ideas or comments I would love to hear them.
I went to Best Buy and bought a new 600W Corsair PSU. I tried rechecking all of my connections and reseating the RAM and video card. Still the same problem persisted. No power for more than half a second. I tried using the new PSU which I bought, still no power. This rules out the PSU being faulty. I returned the 600W PSU to Best Buy.
Tried different outlets along with different power cables as well. No luck.
Any idea on how to proceed from here? I was considering going to my local compusa and purchasing a new CPU and see if the computer will stay powered on.
Shorted motherboard is more likely. Extra stand off? When its fine once and not fine when you touch it or move it, it was moved into a shorted position? Not sure how to properly describe what I'm thinking.
Standoffs are those things between the motherboard and the case. It's possible that you have an extra one that shouldn't be there. This would explain why it worked for a bit, then when you moved it you flexed the case and the board is now resting on that standoff that shouldn't be there. Its now being shorted to the case which would prevent it from turning on. You might want to stop and make sure there are no extra standoffs, that the motherboard is aligned correctly with those that are there, and that it is screwed down tightly.