My TCL Roku TV was sitting for a few weeks And when I went to turn the power on, it wouldn't turn on

Hi, RBS6980 

Welcome!

Thanks for reaching out about the issue you've encountered with your Roku TV not powering on. I'm here to refer you to the right support 

For this matter, it's advised to contact TCL's support and inquire further for assistance. Roku TV manufacturer provides direct support with their TV models.

To contact them, refer to TCL Support

Hope this helps.

Thanks,
Roku Community team