[R-390] R-390a no receive

[K7iou1]

I removed the external SSB device & the motor boating is gone. 
The receiver doesn't receive. 
AGC & MGC carrier meter indicates 0.
AGC adjust @ Zero has no affect.
If I turn on Line meter +10 LL reads 9, if I got to 0 or -10 LL meter pegs.
Jumpers on terminal strip seem to be correct as my other 390.
AF function seems ok as I hear level raise and lower in speaker.
If you saw my other email the audio module was heavily modified.
Could a diode in the SSB module gone bad and taken something out?
Thoughts?
Regards
de k7iou