Posting this here as well.. looking for all the help i can get.. well i just finished fixing my mach 2 st i got off ebay.. here is movie links as to what the problem is.. the first one is with nothing connected to it but the power cable and me jumping the blue/white wires.. it does the same thing when connected to the computer except it will blow the fuse when the red light comes on.. i can get it to run with a second psu connected.. but without the second psu it does what the movie shows (blows a fuse when connected to mb)..
Mach 2 Starting Error Video
Mach 2 w/Second PSU Running
Mach 2 Starting Error Video
Mach 2 w/Second PSU Running