Bad electrical connections.
Nothing. Yes! Of course it is.
The year, make and model would help but with some vehicles all the dash cluster gauges are protected with one fuse.
The most common is the generator. But don't forget the piezoelectric crystals in ignitors and strain gauges.
Answer 85 Toyota PU gaugesSince the speedometer is a mechanical connection and the rest electical, about the only thing that is going to affect them all is water. Does the windshield leak. Could be just bad luck the speedometer went at the same time as the gauges, but doubtful.
C. Temperature and Sanitizer Gauges
Babalo
If your Chevy trailblazer 2004 gauges are not working, check your fuel pump.
Mechanical drive for the speedometer only.
You probably have a short in your abs system which has blown your fuse try pulling the fuse. This happened in my 2000 sunfire and I pulled the fuse and all the gauges work now.
If they are stock then there electric.
Lose of power or ground since all the gauges quit working.
They are probably not working because they are most likely broken.