1991 240sx HUD and Digital Speedo not working?

[VTECking]

So I turn the ignition on the ON position and the speedo and the HUD will not light up but everything else will. I heard this is a common problem so how do I go about fixing it? Is it a bad relay or something like that? Thanks IA!!!

[allmotorEJ8]

So the display shows in the cluster just not the HUD? If so push the HUD button thing on the cluster to light it up.

[VTECking]

^ Naw, neither one is lighting up at all.

[allmotorEJ8]

Not sure then. I know I hit my knee today on the dash under the steering wheel and the lights on my cluster and hud went off for a sec then came back on. So I'm gonna guess it has something to do with something in that area, but that's just a guess.