How to change dvd player stuck showing mirror image?

spacemissing

Obtain a service manual for the specific model of your player. In it, there should be a section that covers the problem you are having. Bear in mind that service manuals can cost upwards of $50, and new DVD players don't cost much more than that these days.

Robsteriark

That depends entirely upon the exact make and model. But somewhere in the settings menus there will be a means of laterally flipping the images so that they are not displayed in mirror image. That could be on the DVD player itself or it could be a setting on the TV you’re using.