hitachi model 50fx19k

[mac08]

I have the Hitachi 50fx19k projection tv that has a visible arc at the base of the green tube. You never know when it will arc and it doesn't seem to affect the picture. It sounds loud enough to be high voltage, but you can see no visible signs of an arc. It appears to be at the board that plugs to the base of the tube. Anyone heard or seen this problem? Any help would be greatly appreciated.

[minnie]

#2698671 NLA. 3 CRT boards. Unplug set! Remove crt board and clean the pins on the crt with an electrical solvent and wire brush. Clean spark gap on crt board. If you don't understand this, don't try it.