Problems after a firmware update
10 usi3d guides for “Problems after a firmware update”, each with the likely causes, how to check which one is yours and the step-by-step fix, with each manufacturer's official sources.
3 apply to any FDM printer and 7 are for Bambu Lab, Creality, Elegoo, Prusa and Voron printers.
Each guide summarises the official documentation and says whether usi3d has already verified it on a machine.
Any FDM printer (3 guides)
- Klipper: board communication errors (Lost communication with MCU, MCU shutdown, Move out of range)
The print stops and Klipper shows an error: “Lost communication with MCU”, the board (MCU) goes into a shutdown state, or “Move out of range” appears, sometimes right…
- Problems after a firmware update
After updating, the display shows squares or strange symbols, configuration or memory (EEPROM) errors appear, the first layer or temperatures no longer behave as before…
- The printer cannot find the firmware update on the card or USB drive
You have copied the new firmware to the microSD card or USB drive, but the printer does not offer to update, cannot find it, or the update stops halfway.
Bambu Lab (1 guide)
- The Bambu firmware update fails or can't be done online (updating from the microSD card)
The update download stops or fails, the printer has no internet access to update, you need to go back to an older version, or after connecting an AMS Hub the printer…
Creality (1 guide)
- K1: update not found, update fails or it stays on the start screen (memory full)
On a K1 series printer, the online (OTA) update says «You are currently on the latest version» even though a newer one exists, the update fails, or the printer stays on…
Elegoo (3 guides)
- Elegoo CANVAS: the four lights flash red, the print pauses by itself or the printer does not recognise it
With CANVAS fitted to a Centauri Carbon or a Centauri 2 series printer, its four lights flash red at power-on, the print freezes or pauses at random points, the screen…
- Neptune 4: Klipper errors «Extrude below minimum temp», «Move exceeds maximum extrusion» or «MCU shutdown»
The screen or Fluidd on a Neptune 4 (4, 4 Pro, 4 Plus or 4 Max) shows «Please run 'SDCARD RESET FILE' or 'FIRMWARE RESTART' to resume» followed by «Extrude below minimum…
- Neptune 4: Klipper motor error («TMC stepper… reports error», «No trigger on x…»)
The Neptune 4 or 4 Pro screen (or Fluidd) shows a motor error at power-on, when homing or while printing, and the printer stops.
Prusa (1 guide)
- MK3S+: the IR filament sensor fails (asks for filament change, no autoload or no run-out detection)
On the MK3S+ autoload does not start when you insert filament, the printer does not pause when the filament runs out, or at the start of every print it asks you to…
Voron (1 guide)
- Newly built Voron: motors reversed, homing the wrong way or endstops not responding
During the first startup of a Voron running Klipper, the toolhead homes to the wrong side or diagonally, a motor buzzes without moving, the wrong motor moves, or an…
More “Connectivity and firmware” problems
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