In article ,
says...
It's probably not a bad CRT but an electronic problem like the HV power
supply..

Do you have the service manual? I think I've seen it on eBay for about
ten bucks. There is a pretty detailed troubleshooting flowchart for "no
visible display".

--
Jay Levitt |
Wellesley, MA | Hi!
Faster: jay at jay dot eff-em | Where are we going?
http://www.jay.fm | Why am I in this handbasket?