Nim

Gauge problem, (2004 SeaDoo Sportster 155 hp, 15ft) – Has anyone experienced this problem or a similar problem?  After winter storage in Houston, Tx; I found that none of my Gauges (Fuel, Tach, Speedo) work, they are locked down with a "mid-scale" reading.  None of them move, no matter if key is off or on, boat is running or not.  Gauges all have 12 VDC to the backs with the key "ON" and have a good ground; also, I've checked all the fuses for continuity with a Fluke VOM.  Boat operates normally except the Gauges are locked in one place on the scale.  (Note: Oil Pressure Light, etc. work properly.)  Any thoughts would be appreciated, "Thank You" in advance, Nim.