Originally posted by aardvarkgeo No, for some reason it doesn't start up again until I put the battery into the charger
OK, can you test what happens if you remove the battery after it crashes, and leave it out for, IDK, 20-30 minutes? Or, however long you usually charged it. Perhaps the camera needs longer to normalize or cool down after a crash.
Also, how long can you leave the camera on and review pics? Or, for that matter, how long can you keep it on in shooting mode? Both of these utilize the LCD, and the latter puts the SR, metering and AF systems to work, as well. If it were a battery issue, this should crash it within minutes, too. The act of taking the picture doesn't normally cause a huge drain compared to normal operation (which is why some of us think it's a short somewhere).
I realize none of this helps you fix it, just trying to think of ways you can further troubleshoot.