Thanks for the encouragement - I agree generally, it is just that my primary focus is to use test equipment in service/design,rather than to spend inordinate time repairing it. Having said that I know I would love doing anything I felt was a challenge I could overcome!
If I could have found someone -- an expert on the 485 to take it on for a reasonable fee, I wouldn't mind so much compensating said person... however I DID get immense satisfaction I followed the Tek manual to isolate the problem; without that I would have given up a long time ago!
With the 454, it's no match for the 485, but at least it's a Tek analog scope with no apparent HV issue (yet).
Cheers,
Ronan/KB6NHQ
