Roku tv's use a different IR code set then stand alone roku devices, for IR which will just work without pairing it has to be true Roku tv remote. But it doesn't have to be a jvc roku tv IR remote, any of the following roku tv brands would work too. Tcl, insignia, element, magnavox, westinghouse, onn, philips, haier, hitachi, and sanyo.
Do you have cable or directv remote that can be programmed for tv brands? Or even older universal remote lying around? Your jvc roku tv uses a very old tv code set going back to 80's. So there are many remotes out there that could control it. At least get you set up with new internet crewdentrails? List them if you have them I might be able to come up with a code for you?
You could also get roku voice remote from walmart or best buy, it doesn't need to be hooked up to your internet to pair with your roku tv.
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