iPhone 4 not backing up

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Joined
21 Mar 2011
Posts
300
Location
Warrington
Anyone else come across this problem I'm trying to back up the iPhone 4 in iTunes, the cable is connected to the pc I've been using the last year or 2 but it no longer connects just a continuous beeping sound as if I'm constantly unplugging and re plugging the USB in but I'm not:confused:

The sim is no longer active not sure if this is the issue?
 
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