BMW

Does anyone know a fix a very dim radio display without changing the
whole unit? The radio is the standard U.S. Alpine-built chostinghostinghostingette
unit(with trunk CD controller and WX band)in cars from 1996 until the
end of e36 cars. Any help would be appreciated. Thanks!!
'96 318i
106,000 miles, not too powerful, but still gets 32 mpg on the highway,
25 mpg combined hwy/city.