I ordered my Raxiom Navigation over a year ago. Months within installing it, my first one started failing on a daily basis.
They (AM) told me it was due to the Nav's overheating protection being faulty.
So AM was awesome about sending me a replacement and then allowing me to install it, and ship the old one back. That fixed my problem for a little while (probably because the weather was cooler at that time)...Until summer rolls around.
In California our summers can get pretty warm. It seems that any time we get our warm days (usually summer), my Navigation screen goes black and I have to disconnect my battery and reconnect it to reset the "overheating protection" or whatever on my already replaced navigation.
So in other words, on our nice warm sunny days, my navigation doesn't work. What a load of crap.
I'm not sure I'd ever order another raxiom nav or recommend one. It is embarrassing when your with friends and your nav doesn't come on and you have to pop the hood...
Edit, here's a video of my car on and the nav not working
Might want to mute your speakers. Sorry)
raxiom not working - YouTube