Hi @JamC,
Welcome to the Roku Community!
Thanks for letting us know about the behavior you are seeing with your Roku device and we apologized for any inconvenience this has caused.
Please be advised that it's fairly normal for your device to get warm during use, but if you are seeing a message on the screen mentioning overheating, there are a few things you can do to help.
For more information visit our Support page here: What to do if the red light is on or you see a “Your device is overheating” message | Official Roku ...
We'd recommend ordering a free HDMI extender from our website and seeing if that resolved your issue.
Please let us know if the issue is fixed or reply back to the thread for further assistance, we will be glad to help you.
Best regards,
Mary
Mary F.
Roku Community Moderator