Diplomat APP2440 cooker hood light problem

[Why Not Indeed]

Diplomat APP2440. Probably about 16-17 years old.
Light doesn't work. Fan works fine.

If you hammer away at the light switch, the light will flicker. If you wiggle the fan/light cable, the light will flicker. So something in that control box is loose or worn out.
I have removed the two screws indicated with the pink arrows but I cannot get the box to budge. There are no screws visible from the outside. Pushing on all the buttons doesn't seem to dislodge it.
Any ideas?

 

[chivers67]

Sounds like you need to re-terminate the light cable at both ends or at least the light end

 

[Why Not Indeed]

It's the switch end. I can't do that without getting that box out.

 

[EFLImpudence]

Is this not a screw? Presumably another one at the other end behind the cable.

 

[Why Not Indeed]

Yes that's definitely a screw but I can't believe it was fitted afterwards. There's only about 25mm between it and the top of the hood. I will try...

 

[Why Not Indeed]

So, turns out that the metal plate above the switch box was "glued" in place by ancient grease . I got a bit more brave with a screwdriver and found that it was very slowly moving and eventually came off!
Once in the box, I found a dry joint between the light switch and the board. Sorted!