One problem related to instrument panel failure has been reported for the 2006 Toyota Prius. The most recently reported issues are listed below.
On the morning of may,04,2015 upon entering the car and starting it up the instrument panel fails to display. Not certain what the issue was I performed various check including the the accessory battery and attempted multiple times starting and stopping the car to no avail. I left the car where it was and a few hours later when I returned everything worked fine for a few more weeks then the issue occurred again. However, I have noticed that the issue is occurring now more frequently including when driving (stopped then go). Furthermore, whenever this issue occurs it becomes almost impossible to power the engine off and since their is no cluster display to let you know vital safety information, including speed, gas, mileage, gear (d-r-n) this creates an unsafe and hazardous condition for operators of this vehicle. Toyota motor corp. Is very much aware of this hazard which results from a manufacture defective combination meter.