I agree, a good pocket knife is a great purchase!
One thing for readers to keep in mind is that unless you know how to fight with a knife (and know that the assailant doesn’t have a firearm), then it’s a very bad idea to brandish a knife even as a threat. If the assailant is able to disarm you, then you’ll be in a much worse situation than if you didn’t have the knife at all.
I’ve had this same issue with a smart TV and you’re suggestion was what fixed it