[Kenwood] Tr-9500 Problem

[Steve Sutfin]

Hello to the list,
  I'm trying to resurrect this old UHF rig as I have a TR-9130 that  
works great. The 9500 receives fine but I've got no carrier in CW or  
FM mode and no modulation into the mic on SSB. When I key the mic the  
meter seems to go slightly negative.....like a possible short  
somewhere? I suspect something in the carrier board. I have the user  
and service manual and can certainly read a schematic but I do not  
have much test equipment so would like ANY info on where to start  
looking.
tnx & 73,
Steve k7dna