So it worked normally, but now no power to the stick, does not light up at all. It’s like the LRWR is not getting power to the stick.
You didn't mention if you tried a wall adapter. (you may need to try a couple different ones if you are unsure of the voltage/amperage of the adapters).
You also mentioned that you tried other non-Roku power cables. Will these power cables at least "power on" the Roku device? (especially when used with the wall adapter). The non-Roku cable should at least provide power to the device, but wil not allow network connection or remote usage. (just checking power here).
If the other cable provides power to your device, then the LRWR is probably bad and will require replacement. Report back your troubleshooting findings and can direct you accordingly.
