Recreational Vehicle Lpg Tank Valve/gauge problems of the 2006 Toyota Prius

Parked car at night in colorado in February, 2015. Outside temperature was approx 25 degrees farenheit. We ate dinner at a restaurant, came out and started the 2006 Prius. Instrument cluster panel showeing the fuel gauge, odometer, shift position and speedometer failed to come on. Turned car off and on numerous times - no instrument cluster panel lights. The following morning, the instrument cluster panel worked fine. This has happened occasionally since the first incident in February. This is a safety concern; one is unable to tell which gear the vehicle is in, the speed of the vehicle, or how much fuel the vehicle has. After contacting Toyota, they told me the extended warranty had expired in December 2014. As a safety defect, Toyota should still be covering a known problem.