I bought 6 VER009s risers.
I plugged everything in as normal, tested the board with the GPU in the socket for a startoff, was fine.
Hooked up the risers and GPU's and started computer. CPU fan gave one spin then nothing.
Thought I had a bad motherboard so took it back and got a replacement.
Installed it and hooked everything up and the same thing happened.
So took the whole rig into the computer shop so they could try it..
3 mining extra motherboards, brand new CPU, Brand new PSU later.
The risers were the last thing it could be.
Bought some VER 006c risers that I normally used from normal supplier.
Bought another motherboard as the other one was away for replacement taking 3 weeks to come back..
Very carefully followed normal process, booted up the first time with the GPU in the motherboard slot, checked bois, everything looked good.
Plugged one GPU into a riser and into the board. Started computer and it bloody worked !!
And its still mining now with 6 GPU in it without a problem.

It was the VER 009s riser all the time blowing Motherboards. I've never seen that before.
Learnt my lesson, I'll only buy VER 006c risers now which is what I normally use.