Andrews machine dual system restore a key method in the car

pull out car key,press RST(a small hole,insert pointed pen into the hole,when you hear light voice,you success).At the same time,strike fire to start the car(you still press RST),after press RST ten seconds,release.Turn on car dvd power,at this time,come into automatic update status.wait for about 3 minutes,screen correct interface appears.after with touch pen to correct,finish.