Supply system issue

[RobinL4]

Ink level low in my hp office jet pro 8720

changed ink cartridge 

Printer message confirmed the replacements were genuine HP cartridges

then got message saying supply system problem 

tried switching off printer and restarting - same message 

[Hawks_Eye]

Hi @RobinL4 

Welcome to the HP Support Community! 

Thanks for posting your query! We're here to help you get back up and running.

Perform the following tasks in the order given to resolve the 'System Supply Problem' error. Use the printer after each task to see if the issue is resolved.

Reset the printer

Reset the printer to recover from printer errors or failures.

Press the power button to turn off the printer. If the printer does not turn off, disconnect the power cord from the printer.

Unplug the power cord from the power source.

Wait 60 seconds.

Connect the power cord directly to a wall outlet and to the printer.

Turn on the printer to complete the reset.

Check cartridges for ink

Shake the cartridges to verify they contain ink.

Turn on the printer, and then open the door or lid to the cartridge access area.

Wait until the carriage is idle and silent before you continue.

Push each ink cartridge to remove it.

Shake the cartridge to verify that it contains ink.

If the cartridge contains ink, push it back into its slot until it snaps into place.

If the cartridge does not contain ink, replace it with a new cartridge.

Repeat these steps to remove and check all the cartridges.

Close the door or lid to the cartridge access area.

Reseat the printhead if it has a latch

Open the door or lid to the cartridge access area. Wait until the carriage stops moving before continuing.

Look for a latch on the carriage. This step applies only to printers with carriage latches.

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

Lift the carriage latch, slightly lift the printhead, lower the printhead back into the carriage, wiggle the printhead left and right, and then lower the carriage latch until it stops.

Close the door or lid to the cartridge access area.

Reconnect the power cord to the printer.

If the error message still displays, repeat the steps to reseat the printhead up to three times.

Replace all ink cartridges

Install a new set of cartridges to resolve certain ink system-related errors.

Obtain new cartridges. HP recommends genuine HP cartridges.

Contact HP Customer Support to obtain replacement cartridges if the cartridges or printer are under warranty.

Purchase cartridges at the HP Store or a local retailer.

Open the door or lid to the cartridge access area. Wait until the carriage stops moving before continuing.

Remove a cartridge, and then insert the new cartridge into the slot.

Repeat these steps to replace the other cartridges.

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Take care, and have an amazing day!

Regards, 

Hawks_Eye