Why can't closed-circuit monitors be shown after thunder?
If there are no replacement conditions, no replacement of the device, you can start with a variety of testing methods.If it doesn't work, then go back to the factory for maintenance.
General monitor is rarely a lightning fault, we use the project, monitor MERWAY tiger, have never had this problem. You can also rule out if the front camera was damaged by lightning.
If not, you can use a bad power supply and an interface, and suggest alternative if necessary
