Firmware update fails - beeping display
I want to install a Bltouch module because my print bed is warped heavily. Can't level it with the knobs.
I have a 4.2.2 board and downloaded the corresponding bltouch firmware from crealitys download page (with bltouch support), I even tried the original marlin builds with the same result.
As soon as I update the firmware on the printer by inserting the sd-card and booting it up, the screen stays black (only backlight turns on) and the display starts to beep like crazy.
Any suggestions what to try next?
Firstly ensure that you use a good quality uSD card, NOT the stock one.
The SD card must be no bigger than 32GB.
Ensure it's formatted FAT32 then put the firmware .bin file in the root.
The firmware filename must be unique (not used previously) and must be no more than 23 characters long including the .bin extension. I use "firmware<date><time>" for uniqueness.
I suggest that you use the firmware from Smith3D, not the Creality one.
The Smith3D has some nice extras - just make sure you download the default one for the 4.2.2 board. You can always change it later.
@mgrobot I had the same problem. Figured out that I was using the wrong build with my Ender 3 V2 with a 4.2.2 board. Should have been using the V2 build and not the Ender 3 4.2.2 board build.