How do I fix my HP printer from blinking?

If the Power Fix HP printer in error state at a steady interval when the printer is processing a print job. If the Power light blinks fast, the ink cartridge door might be open, or the printer might be in an error state. Verify that the correct print cartridges are installed. If the light is flashing. If an error message displays on the computer screen, follow the on-screen messages to resolve the issue.

Resetting the All-in-One might resolve the issue.
With the printer turned on, disconnect the power cord from the rear of the printer.
Unplug the power cord from the wall outlet.
Wait at least 15 seconds.
Plug the power cord back into the wall outlet.
Reconnect the power cord to the printer.
Turn the printer on.