I'll try and figure out how to get a screen shot to you. But for now what I can tell you is that on the default cesna the only gauges that appear are the air speed, fuel @ fuel flow, temp & pressure, rpms, and vor2 indicator. The places for the missing gauges are there but the gauges don't appear.
Hi there. I suspect you've overwritten a default gauge with one with the same file name from an earlier version of FS. You can fix this by copying the file direct from the FS2004 CD.
I think the file you need is named Cessna.gau. You can find this in MSGAME3.CAB on FS2004 CD #2. Paste a copy of this file into your FS2004\Gauges folder. Overwrite files when prompted. Please tell me if that fixed it.
To avoid this happening in future I strongly suggest not overwriting files when installing gauges included with 3rd party aircraft to the FS2004\Gauges folder.