my convertible quit. no light. it doesn't even blink when tonneau is not in

Hello, The switch that recognizes the tonneau cover is highly likely the culprit. With the tonneau cover out, the top will raise, but I'm sure you noticed the top will not raise if the tonneau cover is installed. Have it inspected, and make sure the switch is faulty before replacing. Here is a list of certified shops in your area if you would like to have the top diagnosed: http://repairpal.com/lexus-within-10-miles-of-clinton-arkansas-72031