The hour meter my have not been turned on when machine was deliverd when new there is a menu when going in to analyzer to turn hour meter on your unit my be in demo mode when put in service they turn off demo mode and that starts the meter to run

Fuses an display and all that are good after removing oil pressure sensor wiring traced it back wire splits to 2 an 1 runs to low voltage disconnect our company has added on Thanks input

There's possibly an issue with a fuse blown. The serial number and machine build could be in the era of it being either a fuse and or a on with analyzer functions. Any way to switch out a display with a known good one? To eliminate harness... etc. have had 2 in about 1k machines that all of a sudden just quit working. Maybe just best after the troubleshooting doesn't find the issue is replacement. That was our 2 repairs to resolve the issue.