Venturer dvd problem. Hi I have a venturer portable dvd player pvs166w. I loaned it to someone who

Question

Hi I have a venturer portable dvd player pvs166w. I loaned it to someone who tried to change the region to region free and when I got it back it does not except discs. I loads for quite a while then display 'invalid disc'. Is it faulty or can it be changed. I have looked up on the net and changed it to region 2 but it still comes up with same error.