Right. Had done, and with respect to the video: Same VGA cable, same VGA monitor, swapped to VGA output of my ol' laptop, works fine. For the HDMI output, using a 2nd monitor with a HDMI input, same HDMI cable, same (2nd) monitor, swapped to VGA output of my ol' laptop, works fine. The one thing I haven't tried is the DVI outputs. I'll have to borrow a monitor for that.
The power supply voltages all check out ok under modest load (operation = idling due to lack of boot up), at the connectors on the far end (such as the back of the plug into the MB). An exception is the supply cable to the DVD drive and the HD, where I had to check at the rear of the connector @ the power supply, but the HD and DVD drive were still connected to that supply cable. The DVD will eject and load, and the HD appears to be spinning (both after power on, obviously).