Question Z390 Aorus Master CPU light won't turn off

[TheRealMarshmallow]

I have recently built my first PC using a Z390 Aorus Master as the motherboard and an i9-9900k as the CPU. It was working absolutely fine for a couple of days before it just shut down and wont come back on. I all works, the fans spin but the CPU light is now constantly on and I cant find a way to fix it. Has anyone else had this issue? Or could offer some advice?

 

[bmockeg]

Just shut down while you were......

 

[bignastyid]

What post code does the diag led show?

 

[TheRealMarshmallow]

Just shut down while you were......

Playing a game.

 

[bmockeg]

Playing a game.

Please list full system specs. As asked above, what code does the motherboard show?