power runs but comp doesnt boot

[ksiolajidebt]

 i just built my new computer, and when it first booted up, it was fine, but the monitor cant seem to find its signal. so, i rebooted the computer, but this boot failed. when i pressed the power switch, only the cpu cooler fan will run for 1 second, then turn off. and nothing else happens. did i fry the cpu from the first boot? or did the motherboard fail? or did i plug something in wrong? please help.

[TheKDub]

I think that it might be a bad motherboard, Make sure all essential connections are secure.

[Virgule]

Look at the motherboard right after you press the ON button. There probably is a LED displaying 2 numbers on it. They normally display a few numbers then the motherboard boots. If some kind of problem is detected, they will stop on a specific number. In this case, you motherboard manual will tell you what that means. Report back with the result. 

 

That said, you should check some things FIRST : 

 

- Make sure your PSU works. This can be done by shorting 2 pins in the 24 pin atx connector (REFER TO SEPARATE THREADS ON HOW TO DO IT) and turning it on and looking if the fan spins. A multimeter can also assure you every power connector works.

- Make sure the 24 pin ATX power connector is inserted properly

- Make sure your 4+4 pin power connector is inserted properly

- Make sure your second 4+4 pin power connector (if your motherboard has one) is inserted properly

- Make sure your RAM stick(s) is (are) insterted properly and in the correct DIMM slots (refer to manual for positioning) and make sure your RAM is supported by the motherboard (refer to the manufacturer's website for supported RAM sticks)

- Make sure you use a CPU that is compatible with your motherboard (refer to the manufacturer's website for supported CPUs)

- Make sure your cpu is seated correctly. LTT has some build videos where he explains how to do it. Just one thing : DON'T FORCE IT.

- Make sure your GPU (if you're not using a intergrated graphics CPU), is seated properly and the its power connectors are inserted properly.

 

 

When I say inserted properly, talking about a power connector, that includes the PSU's side.