2001 v70 -dash/display lighting poor
 

We have the dash , radio , and other info display that is very low illumination , but sometimes randomly it goes bright/normal , also the headlight control and interior lighting adjuster dial are not able to be adjusted or controlled, luckily the interior and headlights do operate. Anyone else have this issue - looking for solution, I have a feeling it is failing circuit board connections, solder, wiring connectors...