Ideally we would remove the risers - but they're not attached to the case so on theory shouldn't cause a shorting problem.
Unfortunately, you need to remove the finicky case cables - and usb headers etc..
Leave PSU attached, or attach it again.
I dont see a 4 pin? See a 6 pin? (See my motherboard photo)24 pin (large one) and the 4 pin (marked atx 12v) - the 4 pin attaches just above the CPU to the left.
Did you disconnect the CPU heatsink cables? If you did re-attach.
(we will be touching pins with a single screwdriver again 0_o)
Yours is a 1.2 revision.
?Hmmm... When I updated the BIOS I did the rev 1.0 as thought that's what it was.. oh dear.
?
what does it say on your board - look at the edges.