Nav Radio issues?

[giant h2]

Hello gang happy peaster!!

Hummers great, 125k miles now.........

My wife recently had an interesting issue. She told me her nav radio would not turn on for a few days, also no back up cam. On the third day the car would not start. Called AAA they charged the battery, check it and the alternator both ok! Radio works again but now seems to reboot itself while on? Goes to the H2 screen like at start up?

Anyone have any ideas??

Oh its a 2005 H2