In the auto position the light goes green for 5-6 seconds....and when you are sliding between auto and L position on the switch...you get sound normal level sound for just that 1/2 second....

 In the auto position, if you turn up the volume alot...you can hear music...though very low and distorted....

I doubt that the fault is on the input selector part of PCB2 where you appear to have been changing components. Whilst it has the circuit for the input select and line condition change circuit are on this module, your "Problem Statement" seems to suggest that for the few seconds it apparently works i.e. the green light is on and the sound lasts for a much shorter length of time, so the amplifier is more likely to be drawing more current than it should.

I suggest that in its failing state you check the + & - 68 volt supply. You can check the +68 volts by measuring across C46 on PCB1 and the -68 volts check across C49 on PCB1

If those are fine, then check the -15 volts at pin 4 of IC1 on PCB2, we know that +15 volts is fine because the Red/Green Led is working. The input selector area only uses +15 volts.

THanks Keith....will do this AM....!!

Hi Keith and others...

With your help...both Penta II's are working...but only with the powerlink converted to speakerlink and in auto... they go into standby and active as they should..  They will not work with straight Powerlink..

THe screens are not working in any way...

Ideas...