Not sure
Boot it to the USB and wait to see if it shuts down before trying anything
If it shuts down did you try removing bios battery for at least 10 minutes?
Yeah tried that, tried cmos reset.
I don't get anything on screen at all, system it turns off within a few seconds.
I'd just like to know what's dead, cpu or mobo.
Only way to know seems to be to buy a 1150 mobo or cpu
It doesn't matter too much as new ryzen mobo and cpu will arrive soon but I hate not knowing what failed as i can't sell or use any of it.