Hi!! My RAV4 2006 intermittently loses p/s, power brakes, the speedometer function and all the dash service indicator lights come on. Than a few days later, the dash indicator lights go off and everything returns to normal. Toyota dealer can't find any error codes. The service advisor said to take the car to a windshield service to check for leaks. The windshield folks laughed at the idea. No error codes. What could be wrong? I'm stumped.