Motherboard Bricked?

Hi, i used mflash to update the motherboard, following all the instructions from msi’s video perfectly. It started off fine but after about 5 mins the screen went black. I’m aware of the importance of not touching it when bios is updating so just left it. 3 hours later and no change i had no choice but to turn it off but now it won’t start or show any signs of power.

I have tried taking out the cmos battery and shorting the connecter for a significant amount of time but still nothing.

Anything else i can try or is it dead?

Motherboard = Msi pro b660m - g