Common problem. The connectors on the back of the gauge cluster are not making a firm contact.
Try wacking the top center of the dash. If they start working then that is the problem.
The fix: pull the cluster. Use contact cleaner in the connectors, no sandpaper. They are lightly plated. Slightly tweak them (bend/twist) to insure a good contact. Go r e a l easy with this. Reassemble.
Redo in 5 years.