Eico 147A Troubleshoot

I have purchased over 600 items on eBay in the past and I have had great results!  I have only had a problem twice out of the over 600 purchases, which I think is a pretty good record!

Unfortunately, I purchased an Eico 147A signal tracer that has a problem.  Normally, if it's a simple problem to repair, I simply repair it, rather than go through the hassle of shipping a unit back.  This signal tracer has a broken switch that is not easily sourced.  I have looked at the usual parts houses like Digi-Key, Mouser, Newarkand Allied and there is nothing available.  I also looked at antique and vintage electronics sites with no luck.

I thought I would post this video of my efforts to check out and repair this unit.  

Enjoy