06-13-2012, 02:06 PM
Sounds like you should clean up the tube pins and sockets with deoxit, you can sweat the pins on the tubes and add a little bit of solder to be sure, retention the contacts of the socket gently with a pick or needle, let everything dry out, and you should be fine.
One more thing, make sure there is nothing hanging down or sagging that will compress to a short when chassis is upright.
One more thing, make sure there is nothing hanging down or sagging that will compress to a short when chassis is upright.