Hi, @Liz3590
Greetings, and welcome to the Roku Community.
Thanks for sharing the experience you've had with the lines on the screen on your Roku TV, and we understand your situation. For this matter, we recommend working with Onn's support directly and inquiring further about other options on how to fix the lines on your screen since this is a hardware-related issue. They can provide a series of options to consider for your Roku TV's situation.
For more information, you can reach them at Contacting Support for your Roku TV.
We hope this will be sorted out soon.
Best wishes,
Kash
Takashi O.
Roku Community Moderator