Not a good sign. That's definitely a weird one especially with just the gear indicator working. Sounds like a software glitch or a communication issue between the cluster and the main computer. Before you head to the dealer try a full power cycle. Disconnect the 12V battery for a few minutes then reconnect it. It's a long shot but it might reset the system. If that doesn't work it's dealer time. They'll need to run diagnostics and probably do a software update or replace the cluster. Honestly, messing with the wiring yourself is risky so best to leave it to the pros on this one.