To resolve the issue, follow the below steps:
Step 1: Follow the weblinkRather that sending you steps in text, i will refer u to the weblink. Where all the info is explained with graphics.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00867129&cc=us&lc=en&dlc=en&product=3177566
click on the weblink and follow the steps.
Step 2: Power cycleFollow the steps below to power cycle your all-in-one:
Verify that the unit is switched on. Disconnect the USB/Ethernet cable from the All-in-One and also disconnect power cable from All-in-One and also from wall outlet.
Wait 20 seconds.
Plug in the power cable to All-in-One and also to wall outlet.
Step 3: Semi full reset
Note: A semi-full reset will do the following:
The user settings to the factory defaults, Language and country settings on some models.
1) When the printer is turned ON, Disconnect and then reconnect the power cord.
2) When the lights begin to flash, press ON and CANCEL buttons simultaneously.
3) When the printer turns OFF, release the buttons.
4) Now turn ON the printer