Unfortunately, interference from cell phones, high power stereo systems, alarm systems, and even high powered CBs from a relatively close truck can possibly cause the processors to freeze or can interfere with the communications bus which can also cause the display to freeze. In most cases, unplugging and reconnecting resolves the problem. It is generally not a sign of impending failure so I wouldn't worry about it. However, if it happens more frequently, then we will need to address it.
Take care.
__________________
Bill Cohron - The Mad Doctor
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997!
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