New CPU - VGA Led - Will not boot !Help

[dalik11]

Hello

Recently I changed my CPU and now when I try to turn on my PC everything starts as always but now after about 5 sec running Red VGA Led comes on on the motherboard and after few more seconds the PC turns off and I dont get any Display at all Monitor does not even power up

I tried to switch back to the old CPU
Restarted the CMOS
Checked every cable every connection
Reseat the GPU
Reseat the RAMs
Update: Tried to use brothers GPU r9 380 ( Not sure ) but still the same problem
Update2: Tried brothers GPU again and the PC will Display but turn off after few sec again
Tried the RAMS in brothers PC they work
Tried the my GPU in brothers PC and it doesnt work but then why doesnt his GPU work in mine? ( Works but turn off after few sec anyway )


None of it helped
Any ideas what should I do next?

CPU - Fx8320 or Fx9590
Mobo- Asus crosshair V formula ( Not Z )
GPU - FXF amd r9 290x

 

[dalik11]

Stupid question but, have you applied thermal paste. Sorry don't mean to insult.
Updated BIOS?
Reseated RAM?

I am not much clued up on AMD so and there boards so can't really offer much

Yes I did apply thermal paste
Not sure if BIOS Updated bur I dont think that will be the problem because even if I put back old CPU still have the same problem
Tried to Reseat RAM and GPU checked every cable everything


I really dont know what to do ...

 

[dalik11]

Bom

 

[dalik11]

Did you plug the 8pin cable in near the cpu.

Yes I did