A few weeks ago my dash lights stopped working. (Rpm, speedometer, fuel/temp) lights. everything else works. All lights and gauges work. Just not the lights for those. I replaced the fuses in all 3 boxes even though they were all good. I replaced the lights even though they were not burned out. Dimmer works. I tried everything I could think of but can't find the problem. My headlights work as well.
Could it be the meter on the board itself? Any help would be much appreciated.

 

Sounds like the board possibly. The other thing to check is if the wire going to the cluster has power. I dont know which one it is off the top of my head. In this link there are 2 links on downloading the oem service manual. DL it and you should be able to figure out what wire is for the lights.

https://acurazine.com/forums/2g-tl-1999-2003-98/does-anyone-have-wiring-schematics-1999-2003-tl-879643/