“Is it necessary to use an AC power adapter with the HP J5740 (the adapter was needed with my old J5780)?”

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• Power supply is internal. Just plug it in. No bulky external adapter. No clutter. No dangling hot junk.

  Answered by TommyToolmaker 9 years ago

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• The printer needs to be plugged in to work.

  Answered by CommunityAnswer 9 years ago

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