• The mains supply at the socket / wall outlet.
• The fuses in the plug / line.
• The fuse on the side of the mains box (cutter)
• The green PSU LEDs on? (indicating DC power)
• That the PSU / PSUs are functional and that they are not shorted out. (You may have to apply power to test the PSU)
• For 30V DC power reaching the main control boards power inlet plug?
  

CadCam Technology Ltd
5 Crocus Street
Nottingham
NG2 3DE
UK

+44 (0) 115 844 8050