Thanks Johnny E. Yes, this is a Model 1940. How about sending boards or the whole chassis in for repair? I was not getting any return, so tested the Magnetron per the manual and it was no good. Also this failure was Magnetron-ish. Returns got worse and worse over a few days until nothing. Replaced that and now voltage tests good, but still no return signals. Actually just a little bit The biggest metal rooftops here at the marina/park are all I can get as relatively small blips. Manual tuning does nothing. Between coarse and fine I am getting the full 5-35VDC to the scanner, but no change at all on the display. Troubleshooting from the manual leads to the IF and MD boards, but I can't seem to find exact matches out there. I know it's old, but was a good radar and to me it's worth putting a few hundred bucks into...