This is on all platforms. I bought this about 1 yr. ago because the other TCL Roku TV had a black screen only. I went to web sights and did all the steps to correct except taking the back off and checking resistors. Can you please give advise on how to eliminate this problem?
If it's a TCL TV you should be asking them for help. Roku only provides the software and it sounds like you have a hardware problem.
Where can I get support for my Roku TV™? | Official Roku Support