My touch screen on my 2006 IS 250 goes off and on. It may stay off for a day or 2 and then come back on. But only comes back on for a short time. I am not sure if there is a short in the computer board or not. I had the whole system pulled out. We looked at the connect to the screen, and could not see a break in that connection. Put the system back, in and it worked for a while, but went back off. The touch screen problem all started when we accidently dropped a penny in the cigarette lighter, and it blew a fuse. We replaced the fuse and the cigarette lighter works. I don't think now there is any link between the cigarette lighter and touchscreen. I just think there maybe a short in the computer board. Does anyone have any suggestions that I can do? This unit controls the AC/heater, and more. I also have been looking for a used one, but they are not cheep. Any help is appreciated!....Tom

Is there anything to resetting the Navigation that is located in the trunk of the car?

 

Dear, Thomp.. did anybody answered your question. I have the same problem on my GS430, 2006

 

Hi, Thomp. I took my car to Lexus dealership-they checked and advised me that the PROBLEM was battery voltage. It was too low. They re-set battery and now evetrything works. You may try it . Good luck. It sucks when your car is "sick".