<< Even better do step 1 before installing the mobo in the case. >>
exactly, also a good idea, is to do step 1, place the mobo on something non-conductive (the mobo box will do) hook up psu and plug it in, and short the PWR pins ( you could connect the cases cable to it if its long enough) and verify that it posts before you install the mobo into the case ... common problem is , once the board is installed, people see that it doesnt post, only fans turn , this is usually because the board is "shorting out" on the case, or something else .. well hope this helps .. good luck ..
-neural