What happened?
The Prusa CORE One, CORE One L, and the Original Prusa MK4/S, MK3.9/S, and MK3.5/S are equipped with the xBuddy board. Thanks to this, and the capability for firmware to check for the connected components, the printer can detect a firmware installed for the wrong printer version.
If the printer recognizes a wrong firmware version installed, it shows the message "To continue, please insert the bundled USB flash drive and install the [Printer version] firmware", with the detected printer model shown in the message.
Error name: Different FW Required
Error code: #31701 (CORE One) #26701 (MK4S) #13701 (MK4) #27701 (MK3.9S) #21701 (MK3.9) #28701 (MK3.5S) #23701 (MK3.5)
How to fix it?
Download the firmware, and ensure the version matches your printer model.
- Prusa CORE One L
- Prusa CORE One
- Original Prusa MK4S
- Original Prusa MK4
- Original Prusa MK3.9S
- Original Prusa MK3.9
- Original Prusa MK3.5S
- Original Prusa MK3.5
Transfer the firmware file to your USB drive. Make sure to unmount the drive from your operating system before physically removing it. Then, follow the procedure for firmware flashing.
2 comments
1. Turn off the printer and disconnect the extension board and door sensor.
2. Turn it on and flash the latest MK4S firmware
3. Turn it off and connect the extension board back together with the door sensor.
4. Turn it on and flash the latest Core one firmware
I started the printer which gave the above message; on the USB stick are the 6.4.0 firmware files for the MK4S and for the CORE one+, but I still get the message.
I had the same issue but managed to fix it. Here is what I've done :
Put only the coreone firmware on the usb drive (formatted as FAT32).
As soon as the printer boots (with usb key installed), press the knob and it should ask you to flash the firmware. If the loading of the bootloader starts, it will display the error.