If the UV light does not light up, follow the UV light not lighting procedure to eliminate it.
The UV light is on, but the LCD does not work. Check whether there are traces of resin leakage. If traces of resin leakage are found, replace the LCD.
If there is no obvious resin leakage,
Shut down and reinstall the LCD cables at both ends to return to normal. Problem solved. Poor contact and loose wiring.
Still abnormal, replace the LCD.
Flash the firmware and confirm whether the firmware is correct (ask the customer to provide the firmware version information and compare it with the machine's SN code label to see if it is compatible). After loading, restart the machine.
For further analysis, please provide photos.