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Power Jack Repair and sales specializes in dc power jack replacements on laptop computers. The DC Power Jack on the laptop is also known as a dc (direct current) power port, dc power input, dc power connector, dc power socket, basically it is an inside piece in the laptop where the dc power plug (part of your AC adapter) plugs into. It usually goes bad if for quite some time you had to wiggle the plug around to make the system power up or charge the battery, it also goes bad if you would accidentally drop the notebook computer from a table and it lands on a dc power plug that would push and break the the inside power jack connector of your laptop. There isn't a company that does a better job than them