Try This :
Connect the printer directly to the wall outlet ; not through any Power strip
Then Unplug the Power cable from the back of the printer
Keep on tapping the power cable for next 30 seconds
Plug in back the power cable;
Open the rear access door and you will get to see some rollers
Clean the rollers with a Lint free cloth Moistened with some distilled water
Try to do a copy if still it doesn works
Then Unplug the Power cable from the back of the printer
With one hand press and hold down the (#) and the (6) button and with the other hand plug in back the power cable ; it will do a Semifull reset on the printer; This will take some time ; Follow the instruction on the screen;
If still it doesn't work then you need to contact HP ;
The toll free no. for HP would be : 1-800-474-6836
They will replace the printer for you free of cost (No Charge if the printer is in warranty i.e within 1 yr of purchase)
Still you may check the link below for further issues:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01312792&lc=en&dlc=en&cc=us&lang=en&product=3795406
Regards Soumajit