What you've described seems to be quite common in cases of lightning strikes. Chances are excellent that it's the PC interface in the 950. In a couple of my old Icom rigs (781, 765) Icom included a couple of "buffer" transistors that would blow if a surge came in on the CIV line. That was necessary as the next stop along the line was the CPU. The transistors were quite easy to replace and cost less than a dollar a piece. Check the schematic for the 950 and see if there isn't something similar on the PC interface. Another thing I've run into when a surge came in on the PC interface line (again, CIV line on 781) was that the connector was not grounded to the rear chassis directly. The connector was mounted on a circuit board and the ground side of the connector went through an inch or two of PC board land before going to ground. In my case, that trace was just vaporized, or at least blown into very small pieces. I replaced that with a piece of wire to ground that that solved the problems.
Another thing to watch out for is the presence of a telephone line in the shack. Chances are you have one and the phone line is coiled up around or near other rig cables. I had one case where the jolt entered the shack on the phone line and jumped to another cable. Even though it was an underground phone line and was properly grounded at the outdoor telephone box, the phone line was blown open at that point and enough of the surge got through to do some damage.
73, Floyd - K8AC
Another ham emailed me and says it is Q3606 on the control PCB. But it is SMD and also glued in. So if I get the SMD out, the glue is another factor.
The control PCB costs $140, but would require a full alignment. I cannot perform that with the test equipment I have. I have test equipment for older tube gear.
