Need help ASAP. Computer powers up but monitor,mouse,keyboard don't turn on

[clandestinex337]

POST is power on self test, its basically self diagnostics at boot up.
You mention that you get no beeps off PC, so something is seriously wrong here.
More than likely your mobo or processor, im a firm believer in always having spare components to swap out so i can find the issue, if you dont have any spares thentry and get some from a friend so you can eliminate things one by one.

well it has to be the mobo then. Cause I just bought a new processor and it still does the same thing

 

[Prodigy146]

Nothing should go on if it was a psu problem, and if it did go on the power supplys fan would be abnormally load or would smell funny, like burning of plastic. if it was the cpu nothing should go on, and again if it did go on your computer would lock up or you would see a cpu failure message on post

yeah it has to be the motherboard

 

[Remeniz]

The motherboard makes no noises. There are red lights that I see, not sure if those are a sign.

This means either a faulty CPU, the CPU isn't seated correctly or a BIOS problem.

EDIT:

Check the 24 pin ATX and the 4 pin ATX (in between the cooling pipes underneath the VRM's) power connectors and check the CPU and the HSF is seated correctly.

 

[clandestinex337]

is it almost a 100% chance its the motherboard? cause I don't want to order a new one and it not be it