Computer turns on, but no display

Noel Noone

Honorable
Oct 17, 2013
4
0
10,510
[PROBLEM]
Computer turns on, but no display

[DETAILS]
Computer is turning on, but the display does no boot up. There is a clicking noise coming from my internal speaker (every 10 seconds if that means anything ?) thought at first it was the GPU and HDD but after disconnecting both, the problem is still occuring. HELP !!!!!
 

Noel Noone

Honorable
Oct 17, 2013
4
0
10,510
COMPUTER IS JUST AROUND 2 YEARS OLD NOW

CPU = AMD FX-4100 w/ stock cooker
MOTHERBOARD = gigabyte 78lmt-usb3
GPU = Sapphire HD7850-2gb
RAM = 8GB (no brand on chip)
PSU = 450 watt

i bought the computer pre-built. It had a HD5450 in it but i upgraded that since then, but had no problems with the 7850. The only thing that i believe is still in warranty is the GPU? everything else expired around a year ago.