the left side of the screen went dark, I could still see the picture but it was noticeably darker on the left side, however the right side was normal.
This is on a Roku TV (one with Roku capabilities built in)?
Roku doesn't manufacture "Roku TV" sets, it only supplies the Roku operating system. This sounds like a hardware issue that needs to be referred to the manufacturer of the set.
Manufacturer support contacts for Roku TVs can be found in this support post: https://community.roku.com/t5/Manufacturer-Support-Warranty-Resources/Contacting-Support-for-Your-Ro...