Mitsubishi WT-46805 Red Goes and Comes

[Bake]

I have an old rear projection Mits. For some time now the red has been going out completely the it comes back. Picture is great when all three guns are working. I took everything apart and cleaned the unit reseating every connection on every board. The set worked perfect for about four days then the issues returned. The red gun has a glow in the bottom of the tube that stays on even when the red gun is not working. Is this possibly an IC problem or should I look else where? Thanks for any input on this problem.
-Bake

[minnie]

Take the front of the set off and look for fluid leakage probably from the red tube.

[Bake]

Hi Minnnie,
Thanks much for the quick reply. I looked around inside the set and didn't and didn't see any residue from fluid. I assume that I should be looking around the base of the red tube and on and below the card that is mounted to the bottom of the tube. Correct?
-Bake

[minnie]

Look on all three boards up front. Usually the middle or right board.

[Bake]

Thanks Minnie,
Just got back into town and had a chance to look inside the set again. I still see no signs of fluid leaking or residue in the set. Any other thoughts? Thanks.
-Bake