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If you are having problems with turning your computer on and off then this may be the repair part you need.
This cable is for the mini tower MT versions of the models listed below.
Compatible Part Number: VW42T, 0VW42T, 30WGC, 030WGC
Compatible Models: Dell Optiplex 390 MT, 790 MT, 990 MT, 7010 MT
Length(approx): 38cm
Package Includes:1 pcs Cable