Instrument Cluster ?

[uncle]

I have a truck that the cluster lights never woked in ( Didn't bother me cause I never drive it at night), but now I want to fix it. All gauges and other lights worked until last week. The temp gauge stopped working. After changing all senders,gauge w/one I know is good and printed circuits,ect., I still cannot get the temp gauge or the lights on the l/h side of the cluster to work. Any suggestions.