ESP not connected #17533 (XL)

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What happened?

The Original Prusa XL is equipped with an ESP Wi-Fi module. This module is part of the XLBuddy board. In case the printer cannot find the ESP module, this error will appear.

Error name: ESP not connected

Error code: #17533

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.

The printer will let you know when the flashing is done. 

A visual inspection

In case re-flashing firmware did not solve the issue, access the XLBuddy board for an inspection with the following steps. 

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, 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, especially close to or on the ESP board. 

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.