New computer doesn't post, no beeps

[zeldor711]

I have recently built a new computer. Parts list are as follows:
CPU - i5 7500
GPU - GTX 960
PSU - EVGA 500W 80+
Mobo - Asus B150M PLUS
RAM - 8GB DDR3 1600MHz
1TB HHD

The situation is that the computer refuses to post with no warning beeps. I have tried:
-Reseating the RAM
-Removing GPU and plugging directly into iGPU
-Unplugging and replugging power cable
-Replugged all cables

The mobo lights turn on, all fans spin. However, the mouse lights do not turn on, and the keyboard does.

The only thing I can think is that the BIOS is not updated to support the new CPU yet (needs to be reflashed) but I am not sure. Alternatively, could be a faulty PSU but I have not had issues with this in the past.

 

[zeldor711]

Bump

 

[The third dude]

Another possibility is that the CPU was dead on arrival. (This is rare, but it does happen) I've had it happen one time and that is exactly what the computer I was building did.

 

[SgtScream]

Work through this checklist and verify everything, even if you don't think that's the issue:
http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems