Disconnect the power cable from the back of the printer
press and hold the power button for 30 seconds with the power cable unplugged
connect the printer directly to the wall outlet without any surge protector
disconnect the power module with the power cable
and try to power onn the printer
if the same issue continues
call HP and let them know the trouble shooting that we did and if the printer is inwarranty they will surely replace the printer for you ....................... thank you
HAMID
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