you must either A. purchase or borrow a new firestick remote and pair it to your firestick using home button.
B. Connect 1 smart phone to old ip addresses network as hotspot and use a 2nd smartphone to connect to your current ip address where ur internet resides and properly is confiugured, you then must download an app known as the fire stick tv remote emulator once doing this ur firestick should be operable from the hotspot using old ip reset the network through the firestick and forget the previous configured Ip address on ur firestick then reboot the firestick and re connect it using the emulator controller on smartphone that has working wifi. problem should be solved, i however have not tryed or attempted this nor do i properly know that i explained it 100% accurately but its tedious so involves some reserch but iv seen positive responses.
or C. connect to your computer the firestick via usb ( your firestick must previously already have usb and adb debug mode enabled in order for this to work )
1st step is to download adb for windows.
connect firestick to your computer via usb
once adb opens youll see a selection of options click new and add your firestick to it it should automatically find it.
click edit to add it manually,
then once its connected you should be able to connect it to your router and local internet using adb command prompt command lines, very easy to find on google the guide and commands. you can reconfigure the ip address for the firestick to connect it to a internet.
once all of this is complete plug the hdmi of ur firestick to your tv and use the keypad on ur adb to navigate through the firestick home interface to ur network to manually manage the internet connection without having to have a firestick amazon remote or application that wont work anyway unless its connected to a wifi connection in the first place. reboot firestick and enjoy ur repaired connection to your streaming device that is terribly designed for user friendly purposes.
or of course the last option if you have an ethernet adapter u can use it to connect ur firestick to a local network. I apologize for any false information i provided to the best of my knowledge I hope like heaven you get help from my info. if you could plese respond and leave feedback on a solution that worked for you involving *not having a firestick remote or anyway to connect it to an internet connection to navigate to change the old IP network* regards,
troubled tech dabbler