How to downgrade firmware (MK4/S, MK3.9/S, MK3.5/S, XL)

Relevant for:

XL MK4 MK3.9 MK3.5 MK4S MK3.9S MK3.5S

Last updated 12 days ago

This article is also available in following languages:

Sometimes it is necessary to reinstall an older version of the firmware. The method to update the firmware only allows newer firmware versions to be flashed. To flash the same firmware, or an older one, follow the steps below.

If it repeatedly only boots the printer and gives you the home screen try to format your USB flash-drive or try a different one. Even if the flash drive works with G-Codes and printing, it may not work for flashing the firmware.

To find the older versions, go to the Downloads page, select your printer, and click on Older versions.

Load the .bbf file directly into the root folder of the USB drive.
Insert the drive into the printer.
Push the reset button, and once the printer logo appears on the screen, press and hold the knob.
On the new screen, confirm the update by selecting the "FLASH" button and pressing the knob.

Factory Reset

If you do a hard Factory Reset, the firmware that is in the USB will also be installed in the printer, so this can be used as a way to update the firmware.

Was this article helpful?

Easy to understand

Solved my problem

Other reason

Comments

Still have questions?

If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to [email protected] or through the button below.