I have had three of these Crossfire's with a radio freeze up and all three times the head light switch was left in the far left position and this leaves the running lights on the left side of the car on all night long and the Battery was run down just enough that on start up it spiked the system. Disconnect you battery and and recharge you disconnect to allow the capisotrs to discharge in the radio. Then you have a fully charged battery. Thank Terry OKC Crossfire?Viper Tech