Hi:

Sorry to hear of your scope trouble ...

1. I got burned 2 for 2 on Ebay scopes

2. I have a Tek 465B and the service manual (I fixed them for a used scope
dealer a few years ago).

I will gladly assist you (walk you through the major tests, or compare readings
from my scope, etc,.

No, the CRT is very simple to swap.

If you are close to PA/OH I also repair scopes, etc., for a very reasonable
fee.

RJ