Moog Prodigy power and audio problems

Hi all,
Have the chance to purchase a Prodigy off a friend of a friend. He assures me it was working fine but when I borrowed it to test it out I cannot get any power or sound from it. The LED does not light up. I have tested a number of kettle leads and Jack leads to no avail. There does seem to be an audible thud through the mixing desk when I flick the power switch on but not sure if this is frothy desk or Moog to be honest. I have had the back off and the three fuses set in a row to the side of the internal kettle lead all look fine. Fuse terminals are clean also. None of them seem to be blown. Any ideas as to why I’m getting nothing from the unit?
Many thanks,
Gezshaper.