Inspect and Reseat Internal Cartridge Floor Cables

If the error persists across multiple cartridges, the issue may stem from a loose connection within the printer's internal hardware.

1. Power off the Form 4L printer and disconnect the power cable from the wall outlet.
2. Access the internal cartridge floor assembly by following the official Formlabs service documentation for the Form 4L.
3. Locate the cable connections specifically for the left-hand resin cartridge floor and the associated RFID board.
4. Carefully disconnect the cables, inspect the connectors for any debris, oxidation, or bent pins, and firmly reseat them to ensure a secure electrical connection.
5. Reassemble the printer housing, reconnect the power, and perform a test print to verify if the 1.9.11 error has been resolved.

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