Yeah, call it the "Zinsco Tester".
I picked up a cheap 20K battery powered hand held LCD scope from ebay a while back to try and find where X10 signals dissapeared. Didn't have much luck with it.
Haven't used it much since.
Also bought 100k Techtronix that was DOA. The guy gave a refund and told me to keep it.
I opened it up and fond a solder bridge in the sweep circuit. A quick dab of the iron and it was fine.
I sent him his money back.
