Hi @ALS6
Thank you for posting here at the Roku Community!
We appreciate you reaching us regarding your concern with your TCL Roku TV. No worries; we're here to provide you with the best resolution possible.
To disable the light under your TCL logo, navigate to your Settings, then select System > Power > Standby LED.
If you need further clarification and assistance, let us know, and we'd be more than happy to continue doing so.
All the best,
Carly
Carly Y.
Roku Community Moderator