I hop in the plane and all of the sudden it doesn't have any tach, MP or oil pressure guages on the EFIS.
they are just "gone"!!! Nobody has touched the airplane since the previous flight.
Checked connections... Everything seems good!
I would think there would be fields present but with red "X" across them if the engine monitoring hardware had malfunctioned ..... But in this instance the fields have completely Disappeared!
If the gauges are gone with no red X that sounds like a configuration issue. Did anything else change? Is your com and transponder box still at the top? You might have to run configuration files again.
When you first start the G3X out of the box it looks like the picture below. You have to run the CubCrafters configuration files to bring up the other fields. For some reason your system must have dumped them. That obviously shouldn't happen. That's my best guess but I am no expert!
I would be making a call to CC in the morning. They can help you get it figured out.