You can access the firmware zip file directly here.
Version 1.3.5 officially added full support for the , which was sold separately but required firmware integration to function correctly (pausing print upon filament detection). Anycubic Chiron Firmware 1.3.5 Download
If your update fails midway or the screen remains dark, don't panic. Check these common fixes: You can access the firmware zip file directly here
: Version 1.3.5 is specifically required for Chirons fitted with a newer style of TFT touch panel. Using the older 1.3.0 firmware on these newer panels can cause the screen to stop functioning. Pre-Installation Anycubic Chiron Firmware 1.3.5 Download