Welcome to the Roku Community, @irmavoyle2012!
Thank you for taking the time to share your insights regarding your Roku remote voice finder, we truly value your input. To ensure we provide you with the best assistance possible, could you please let us know which type of Roku remote you are using? Additionally, please be assured that purchasing a new TV is not necessary, as we offer a remote that includes the feature you’re interested in.
The lost remote finder is supported on any Roku voice remote with a built-in speaker, such as the Roku Voice Remote Pro and Roku Remote Pro (2nd edition). To determine if your voice remote is compatible, look for small speaker holes on the back of your remote. If you do not see any speaker holes and wish to use the lost remote finder, you can purchase an upgraded remote from the Roku accessories store.
Hope you'll find this info useful. Let us know in case you still have any questions.
Thanks,
Jharra
Jharra Q.
Roku Community Moderator