Hi. I noticed that my 1992 Lexus LS400 instrument cluster knob is not working. Only stays on the brightest setting. Won't dim the cluster when knob is turned to the left. I also noticed that the odometer display doesn't light up, stereo/radio display nor the center console panel light up at night when I turn on my headlights. ONLY the climate control display light up at night. Has anyone else had this issue and know what it is could be? An answer would be greatly appreciated. Thank you