If you're looking to repack the firmware, you're likely trying to customize it or ensure compatibility with certain modifications.
Before you grab that random .hex or .bin file from a Dropbox link in a Reddit thread from 2021, know this: anycubic chiron firmware 135 download repack
After installation, verify:
Cause: Baud rate mismatch between motherboard and LCD.
Fix: Re-flash the motherboard using 250000 baud rate. Then re-flash LCD. If still failing, your repack may be for a different Trigorilla board version. Use M115 in a terminal to check your board revision. If you're looking to repack the firmware, you're
Another excellent custom build specifically for the Chiron 1.3.5 hardware. Includes a better LCD menu. Then re-flash LCD
After both updates, navigate to: Control → Factory Reset (or send M502 then M500 via Pronterface). This clears old EEPROM values that cause crashes.