I have an Alpine INE-Z928HD, 8" VGA stereo. the problem is it will randomly reboot. This just started recently. The screen will go black, a second later the music will shut off, a few seconds later the Alpne blue screen will reappear and the radio will come back on. I've hit the reset button but didn't solve the problem.

SOURCE: Alpine CDA-9851 (turning off and back on)

If someone tried to steal it maybe they Jolted some of the wires behind the harness or the connection into the harness and when you are driving it loses its connectivity. Check all of the connections in the harness and make sure noone of them feel loose. Just as a test try putting it in another car(if applicable) or bench test it, I.e leave it hooked up directly to the battery for a while playing a cd with a small speaker hooked up to a channel( make sure wires dont cross...!!!!!!) and see if you can replicate the issue. Just some thoughts.

SOURCE: Alpine Ipod/Stereo Error 1 message

Sorry but the ipod should never "die" when it's plugged in. I own this system and have encountered the same problem. The ipod should be continuously charging if plugged in, therefore it should never run out of juice.
Things I've been told to do f rom Alpine themselves:
-Get latest version of ipod software from itunes
-Plug ipod back into unit (via cord) with car turned off
-hold the center button and play button until ipod resets itself
-take off alpine face
-press the little button behind face to reset unit
I have done this with some success. The problem returned once in a while, however, for some reason after doing the process listed again a few months back, I've not had the error.

SOURCE: ipod control?

You can purchase the KCA-420i and connect it to to the ai-net port behind the headunit. This will allow you to send signal from your ipod to your alpine headunit while still retaining your operating functions to the ipod. Can be purchased for about 10 bucks on ebay.

SOURCE: JVC KD-R200 won't power up for more than 5 seconds

Check your wires they might be touching steel around your car mostly look at your yellow and red wires those are the 1' that give it power and light to your radio also check your radio fuse in the back.

SOURCE: alpine cda-9857r turns display off but is stiil on.

The display can be blacked out on the 9857r. To toggle between display on and display off hold the function button until it beeps.