PC won't start with a new CPU

[Entropyst]

Hello,
I recently got a new A10 7850K processor.
I tried to start my PC, but the monitor stays idle.

I switched to my old CPU (A6-5400K), and it works fine.
I have an ASRock FM288A Extreme6+ motherboard.
It should support FM2+ socket CPUs.
The A10 was able to fit in nicely, so I think it's the right socket.
The cooler fan is working just fine and constantly spinning.

I hope someone can help me.


PS:
I forgot to add that in the bottom part where there is a small screen-like display it displays the code: C7.
I have no idea what does this mean though.

 

[st3v30]

Update BIOS 1st and tell us is problem is still here.
You can easy update BIOS trough windows if you never do it before.
Go to this site

http://www.asrock.com/mb/AMD/FM2A88X%20Extreme6+/?cat=Download&os=BIOS

and download this BIOS

3.70 5/29/2015 Windows® 5.35MB

 

[Entropyst]

That's what I did, but had no time to post it.
But anyway, the problem was fixed and now it appers to work just fine.
Ty for your help.