My hp snprc-0802-01 all in one printer will not come on

Hi,
First, Check if the power cables are connected properly with no loose contacts.Then Check if the LED light on the power module ( adapter ) is lit. If it is not, then the power module is faulty and you need to replace it.
If the LED on the adapter is lit, try connecting the printer to a different wall jack or different socket on the surge protector.
If none of this work, It could be defective printer.
Regards,Suhail