Bric Cpu with Custom boot Pic :-\

[N1kusch]

 

Motherboard B450M DS3H(rev.1.0) gigabyte 

BIOS Version51  SN19349A014626
Nvidia GTX1080
AMD Ryzen 5 3400G
Memory  micron BLS16G4D240FSE.16FBDS 4x 16  gb

Thermaltake 80+ RGB 500W 

Win 10 64-bit 

corsair Water cooler 

Hello, I hope I would never needed your help. But I tried to update the bios picture within windows using the gigabyte bios tool. The operating system got really laggy and my mouse was not functioning as it would normally do(some time’s disappearing, very slow). Then I saw a very high load on one of my CPU Core’s so I canceled the process of changing the bios Picture and Win seamed to work just fine. Then I wanted to reboot the system but all my screens showed a black screen. And the motherboard made 6 beeps with a small brake in the middle. I tried al kinds of bios reset methods but every time I try to boot it only beeps six times. The error code says the cpu is bad :-{

I fear I bricked the cpu, is this possible? 
I took of the watercolor and looked at the cpu and It look fine from the outside. 
Would be great if you could provide some trouble shooting tips ore something I can do to check if the CPU is dead or not before trying to buy Ryzen 5000 series CPU.

BTW ironically I wanted to youse this as my BIOS Boot Pic. 

 
Kind regards Nikolai