Hi, I just bought a F500BT(already updated the frameware to 2.0) and did a try out hook up (just hook up the DC 5V outlet from the car). And I found that the F500 didn't wake up from standby mode by itself after the car start like the manual mention. It show the splash screen for a few seconds and then back to blank screen with the charging indicator on. Is that something wrong with the unit? Or is it because I didn't connect all the color code wire?