Hi . I’m a newbie so hope this is ok . I have a Kenwood series 21 system . I recently managed to track down Graphic/Spectrum . It works great but the problem I have is the display is very faint . Anyone know if it is back lit or not before I open it up?
Almost certainly VFD (vacuum fluorescent display), so no backlight. Likely a duff capacitor in the supply that drives the display. First step would be to have a look around the PSU section & see if any caps are bulging or show signs of leakage.