all lights lfashing on mobile printer - disconnection doesn't help

[EG8]

All lights are flashing on my HP Officejet 100 Mobile Printer.  I have disconnected all cords and removed battery, waited 30 seconds, reconnected and problem still occurs.  What should be done next?

EG8

[TEJ1602]

@EG8, Welcome to HP Support Community!

Going through your post, I see that the lights on the printer are flashing, follow the steps below-

Remove the ink cartridges and reset the printer.

1. Remove the ink cartridges from the printer.

2. With the printer turned on, disconnect the power cord from the printer.

3. Unplug the power cord from the power source.

4. Wait at least 60 seconds.

5. Reconnect the power cord to a wall outlet and to the printer.

   NOTE: 

   HP recommends plugging the printer directly into a wall outlet.

6. Turn the printer on.

7. Reinsert the ink cartridges, and then close the ink cartridge access door.

Try printing.

Also, Update the printer firmware

Download available firmware updates from the HP website

With the printer on and connected to the computer, go to HP Customer Support - Software and Driver Downloads, and then identify your printer. Look for and install any available firmware updates. Refer to the document HP Printers - Updating or Upgrading Printer Firmware

If you still have issues, let me know the lights which blink for further assistance.

Keep me posted. 

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