Saab 340 radios brightness at night

[graidia]

Hi guys

i have a problem with the radios and GPS  brightness at night, i can't see anything even if the dome light is ON.

i have attached a screenshot so you can see the problem i'm having.

 

can someone tell me what's going on?

 

thanks in advance

[Cameron]

Turn your digits knob up?

[graidia]

Thanks Cameron for your quick answer.Today i fired up the plane and every thing is bright.I didn't start the engines, but with the external power the brightness seems to be ok.I'll do a complete flight and i'll report back.

 

Best regards

kais