Gauges not working on a 753

[Loftatsea]

Just picked up a 753 as a backup machine. None of the gauges are working. Since none of them are working I'm hoping it may be simply a fuse? Is this possible? Where should I start to fix this issue? Thank you.

 

[flyerdan]

Since all of the gauges are involved, it could be a power bus, or more likely a ground issue. Bad grounds are a fairly common source of electrical problems.
Best thing would be to grab a book from the manual thread and follow the troubleshooting and wiring diagrams.