Besides the instrument cluster, electrical harness, relays, fuses and ground wires that supply power to the cluster, the only other possibility that I can think of would be
a faulty ignition cylinder connection...
Not exact matches
A
faulty ignition switch is the most common cause of the problem you are having, but it is not necessarily always the cause; for instance, you could have an issue with your
ignition lock
cylinder, or linkage.
Common problems: A
faulty ignition switch lock
cylinder (tumbler) causing the key not to turn in the
ignition was very common in earlier models.