Puppy error #17518 (XL)

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What happened?

The printer is showing the message: "Puppy # firmware not found".

Error name: Puppy FW not found

Error code: #17518

The error message includes the name of the puppy board where the firmware was not found. The firmware for all puppies is part of the Original Prusa XL firmware file. The error is triggered when the indicated puppy firmware was not found as part of the firmware file. 

How to fix it?

Re-flash firmware

Download the firmware, and transfer it to your USB drive. Make sure to unmount the drive from your operating system before physically removing it.

Insert the USB drive back into the printer and reboot the printer using the reset button directly next to the knob to initiate the flashing procedure. In case the procedure does not start, reboot the printer again by pressing the same reset button, and while the printer is booting up, press once the rotating knob.

A visual inspection

From the rear of the printer, loosen the indicated four screws. It is not necessary to remove them completely. Then, slide up the electronics cover to remove it. This will expose the XLBuddy board, part of the Sandwich board, and if present, the XL-Splitter. 

Inspect the boards, in particular the XLBuddy. Check for defects or damage on the surface, such as a detached component, or a visibly burnt spot.

If needed, disconnect the antenna cable from the XLBuddy board, and extract the XLBuddy board, using the two lower ejectors. Touch any electronic board only from its edges to avoid damaging its components. 

Sandwich/XL-Spitter - Nextruder cables

Inspect the Nextruder cables and their connectors, both from the electronic board side and from the Dwarf board side on each Nextruder. Check for any incorrect or loose connections or damage on the cables and connectors. 

For Nextruder 1 and 2, the cables are connected to the top center of the Sandwich board. More reference is on the linked guide, for printers with rear antenna, and printers with side antenna. 

For Nextruder 3, 4, and 5, the cables are connected to the XL-Splitter board.