Monitor says no signal on my new custom built PC

[Meekynz]

Ive seen this a lot on the net but none of the solutions have helped so far.
I just took the plunge to build my first pc. I have put it all together, following the manual and when I turn it on, the 3 fans (cpu, gpu, case) turn on, I hear a couple clicks but I get no signal on my monitor.

I have a Gigabyte 780T-USB3
AMD FX6300
Radeon HD 6670
8gb kingston DDR3 ram.

The mobo is dual channel, so could it be an issue that im only using 1x8gb. Should I get another 8gb?

I really hope if havent damaged anything in the building process. Ive been so excited about this and now im super gutted.

Any help or advice would be brilliant.

Thanks

 

[Rabbit01]

Full model number for the mobo is GA-780T-USB3? Doesn't look like it supports the FX-6300.

http://www.gigabyte.com/support-dow...4DE70BB3E832BEDD48D&s=Socket AM3+&cs=AMD 760G

 

[Meekynz]

Holy crap. Imma kill that guy in the store!!

Thanks heaps. I think a strongly worded letter is in order.

I wont have damaged anything by powering the pc up with the fx6300 in the mobo will I?

 

[Rabbit01]

Perhaps not, but I'll leave that question for someone who had experienced it.