The mosfets are ideed soldered in that weird position but they did that so they can be screwed to the bottom of the psu case. There is a small thermal insulation between the mosfets and the case. Not my ideal way of engineering rather would use a isolated heatsink. But hey it’s made in China 
@Paul_de_Groot I was imagining it wasn’t dead just not 24v.
@Paul_de_Groot what values should i be getting from that diode?
The diode next to 7812 regulator shouls be in just 1 or less than 1 ohm in one direction and infinitive in the opposite direction. If short in both directions than its broken and must be replaced
Thanks Paul, i will try and get it tested later on today if i get the chance. I will let you know how it goes 
@Andy_Parker can I impose on you again? I am researching LPS’s for the community and I discovered that even without an actual supply I can trace the circuits if I have pictures that show me enough of the top and bottom of the board.
The picts you sent enabled me to realize that I can do this. I wanted to fill in what we are missing from the inputs on @Paul_de_Groot schematic but I cannot see some of the part #'s and labels on the top of the board. Can you take a few reasonably close photos that shows the board from above and at angles so that I can see the labels and part #s. I will post these pictures along with the other information to the group.
No problem, if you can highlight the parts you would like better pics of I will do my best to get the photo you need. I have to say though that I can’t read any of the numbers without the aid of a magnifying glass! Gotta love getting old 