HP Deskjet 2540 Drivers | Full Installation Guide - YouTube
HP Deskjet 2540 All-in-One series
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HP Deskjet 2540 and 2545 Printers - Wireless Printer Setup (Windows) | HP® Customer Support
HP Deskjet 2540 All-in-One - Multifunction printer - color - ink-jet - 8.5 in x 11.7 in (original) - A4/Legal (media) - up to 7 ppm (copying) - up to 20 ppm (