Vintage Ibm Px Xt Powersupply ( P8 P( Connectors)

I have one of these original (1984) IBM PC XT 5150 130 W 220 V PSU with p8 and p9 mother board connecors. Although the fan turns, there is no output power to speak of. Putting a volt meter acros the molex gives Red/Black 0.8Volts and Green/Black 0.8Volts. I have opened the PSU and the only thing I could verify is the glass fuse is intact.

The specs are :
Schrack Electronic
EG 071018-\d
Fabr. Nr 35835
IBM P/N 150438
E.G. Nr. 367
CW 24/84

Any help will be appreciated