Welcome to the Roku Community, @ericww11
Thank you for posting here. I'd be happy to help you contact the right support regarding your concern.
In cases like this, we should also consider the compatibility of the third-party external device you are trying to plug into the HDMI port of your Sharp Roku TV. I highly recommend reaching out to the Sharp Support team for further clarification and assistance about this as they manufacture their own player hardware.
You may reach them here: Sharp Support
I hope you find this information helpful.
Best regards,
Carly
Carly Y.
Roku Community Moderator