Insignia dvd player home theater

no error code details have been said.
no model number has been said.

i dont see how you expect anybody to give you an answer.
most people dont need region code changes.
and those that do, i suspect some of them will learn about the chip that holds that information and how it doesnt like being written too more than a couple times.

dont know what code you need, dont know if the information is available.