I guess I don't know where to start.
Dont worry about it. We all have to start somewhere. Look in the backbox. You'll see this huge heat sink. This is the power supply. The transformer is in the bottom of the cabinet. I put the red probe into pin one, ground probe on the ground strap. Mine actually reads 13V but I guess thats OK being that everything is working like it should. The white wires are ground wires and you can actually use the ground probe there if you like but I always go for a ground strap if I can. FYI, on yours, the ground straps are covered in a yellow plastic and there flat. Theres one coming up from the cabinet into the head on the bottom. Cabinet should have a ton of them here and there. Set your DMM to DC and you'll notice on the board beside the connector, theres numbers letting you know what pin # starts where. Mine actually does not have an incoming wire on J5, only on J1 and J4. Dont know what thats relevant to but my chart above is wrong on this one. Read all of them and see where your at. Im still thinking you have a dead short somewhere but getting a voltage reading is a start. Please look around in the cabinet for any thing out of the usual and loose or broken wires and such. Check under the PF and just do a top to bottom check for a possible short.
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