What is this error code and how do I fix it?

[Ecwl1]

our HP Office Jet Pro 9925 will print for a while, the will throw a code B305DFF9.  It won’t do anything at this point.

 We have to unplug it and then plug it back in (the power button won’t work with this code on the display).  This can happen several times a day.  Help!

[KrazyToad]

@Ecwl1

Welcome to HP Support Community

I would like to help

Please try these steps

- Turn on the printer.

- Wait until the printer is idle and silent before you continue.

- Disconnect the USB cable from the rear of the printer. If your printer has a network or wireless connection, leave it connected.

- Remove the ink cartridges from the printer and clean the electrical contacts with a lint free cloth

- With the printer turned on, disconnect the power cord from the rear of the printer and from the wall outlet or power strip.

- Wait at least 60 seconds.

- Plug the power cord back into the wall outlet.

NOTE: HP recommends connecting the printer power cord directly to a wall outlet.

- Reconnect the power cord to the rear of the printer.

- Turn on the printer, if it does not automatically turn on.

- The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.

- Wait until the warm-up period finishes and your printer is idle and silent before you proceed.

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

- If you receive a prompt to print a calibration page, do so.

Also ensure the printer has the latest Firmware https://support.hp.com/in-en/document/c02919168

Thank you

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