We have a user with a blackberry 7130e and the same issue. In her case it looks like it is a calendar or address book isue, but alot of the time it is software that has been loaded onto it causing the problem. Get the BlackBerry JDE Component Package v4.1.0 and use javaloader.exe to wipe the handheld when you first turn it on, and then use application loader again and put the os back on. Id only do this if you really have exausted all attempts to get it booted.
javaloader -u wipe