My stereo receiver (a Sony STR-AV780) has a vacuum fluorescent display (VFD)
which goes dim intermittently. I have replaced some electrolytic capacitors
already which has helped but there is another one I'd like change.
Unfortunately it is mounted UNDER the VFD. The display tube is about 7 by 2
inches and mounted in a dual-inline socket. The socket is not a
zero-insertion-force model.

How do I remove and replace the glass display tube without damaging it?

Chuck