I find it easiest to prop up the top shell on the front right corner of the system. If you're using a flat surface it can stand by itself and there's enough slack in the Genesis PCB and Dial Switch cables to allow it to be positioned in such a way.

You can barely see it but the upper shell is standing upright on the front right corner.

There are 11 screws that need to be removed in order to remove the entire PCB unit.

If the IR lens cover pops out at this point don't worry about it. It can be easily reinstalled during the reassembly process.