Hi
The last 3-4 hams I have helped with the TS-2000 has all had the same problem. The control cable from Radio-RRC to TS-2000 has not beed made straight, pse check yours. If you use the orginal cable from RC-2000 to Control-RRC, and all settings are OK but the cable is wrong and, you will see that the the Yellow LED at the AUX/MIC will light up when you press PWR ON button. Also check the red straps, they are not needed for the system to connect, they are just for the mic signal, but if they are placed in wrong positions they can interfere with the communication as the COM0 is present at the socket also.
73 de mike