Welcome to the Roku Community, @addouglass!
Thanks for reaching out. We'd be happy to share further information about this.
In this case, it may be possible that your Panasonic DVD/VCR is not compatible with your TCL Roku TV. We highly recommend coordinating this with Panasonic Support for further clarification.
You may reach them here: Panasonic Support
We hope you find this information helpful.
Best regards,
Carly
Carly Y.
Roku Community Moderator