best way would be ti replace the cable,but you could just join the cut part together with tape ,what to do is remove the cable from the frame,pull off a couple of staples,then carefully cut a bit of the outer sleeve to expose the cores,find the one that has been cut,they are colour coded so just bare the wire ends that are cut and twist the bare ends together then join it with insulating tape make shure the cable ends you join are same colour then wrap more tsape around the cable
gts, December 2012