Patches and discussion for Ensoniq VFX family

Hi there,  In an earlier post you mentioned a diode replacement on 
the power supply board to correct the problem of the display not 
activating. I think I killed this diode by starting up when it was 
still very cold!  Anyway, I have opened it up and checked everything 
on that board; everything is labeled, but only found C1, C2, C3, C5, 
R5, and R6 suspect by using a volt meter.  So where is the diode?  
Those items sound like capacitors and resistors. Help please!
Dorothy