What should I do if I cannot print from my computer?
First, ensure the power cord is firmly connected and the printer is powered on. If using a USB cable, confirm the connection is secure; if using wireless, verify the wireless connection is working. You can also visit www.hp.com/go/tools to download free diagnostic utilities to fix common printer problems. (Page 3)
From the official HP Impresora Todo EN Uno HP Deskjet GT Serie 5820 manual, page 3
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