Update fix pack - motherboard firmware - touchscreen firmware
How to update the fix pack for Neptune 4 Plus & Max - motherboard firmware - touchscreen firmware:
https://wiki.elegoo.com/neptune/neptune-4-plus-max-how-to-use-motherboard-and-touch-screen-firmware
How to update the fix pack for Neptune 4 & 4 Pro:
https://wiki.elegoo.com/neptune/load-fix-pack
How to update the motherboard firmware - touchscreen firmware for Neptune 4 & 4 Pro:
https://wiki.elegoo.com/neptune/motherborad-and-touch-screen-firmware-update
After completing the firmware update, please test. If there is no improvement, provide the following information to contact the technical support team: