How do I connect the HP Color LaserJet Managed MFP E57540 to a network?
Connect the network cable before powering on the printer. For advanced configuration of network-connected printers, refer to the User Guide on the printer CD or visit www.hp.com/support/colorljE57540mfp. (Page 4)
From the official HP Color LaserJet Managed MFP E57540 Multifunction Printer manual, page 4
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