SX-850 Lamp Issue

[Vintageville]

I am having an issue where only one light in the panel is lighting up. I am referring to the main dial and meter lights, of which there are four. Only the bulb in the furthest left position (when facing the receiver) is lighting up. I verified all three other bulbs are working by plugging them into the the same position. So it's not a bulb issue. These bulbs are all the correct 8V 300MA. Could it be the light board itself? I cleaned the contact areas with a little deoxit (wiped on) just on the contact areas, but nothing. Also, the selector lights still work - all of them. Any thoughts/experience with this issue?

 

[Vintageville]

Resolved (for now); the lamp housing in position one wasn't seating exactly right despite being clicked in, and despite being lit itself. A little more (nervous) pressure applied and the other lights came on.

 

[satellite65]

The lamps are in parallel. Position 1 shouldn't affect the others. I'm thinking you have a hairline crack in the copper foil and the pressure you applied flexed the board and temporarily made connection across the break.

I would inspect the board under magnification before declaring victory.

 

[Vintageville]

The lamps are in parallel. Position 1 shouldn't affect the others. I'm thinking you have a hairline crack in the copper foil and the pressure you applied flexed the board and temporarily made connection across the break.

I would inspect the board under magnification before declaring victory.

Thanks. I was afraid of that. The board has a real slight curve to it such that one side doesn't sit flush, so that explanation makes sense. I guess I need to keep an eye out for the light board.