Do you mean after connecting to the new ISP, all home devices are working and connected to the Internet via your existing router, except your Roku device? Am I correct?
If so, what's the model number of your Roku?
Have you tried to reset the wireless connection by searching for your Wi-Fi and giving the password *****?
Now on your TV, can Roku show your wireless network at its Wi-Fi configuration?
Does your Roku device have an Ethernet port? If yes, try using a network cable to connect the Roku and your Wi-Fi router. I don't mean to ask you to connect this way permanently. It is just a test to determine if it is a pure wireless problem.
Your TV is the only display device having a HDMI interface?
Technically your Roku can connect to any HDMI monitor, such as your computer screen which is movable comparing to your big TV.
> nothing comes up except a screen with the logos of the various channels
I am not sure if you are at the correct screen to setup wireless connection. Are you able to see below screen to setup Roku's Internet connection?
FYI - How to setup Roku 4
Okay, now you just need to soft reset your Roku. Do the following steps.
1. Navigate to the Settings menu.
2. Choose Advanced System Settings.
3. Click Factory Reset.
4. Enter the code on-screen.
Okay, you may need a hard reset now. Do you see the reset button on your Roku 4?
Okay, I opt out and let other experts help you further.
Hello, What that means is the previous expert "opted out"- meaning they can not assist. I am a different expert and what I would like you to do is remove the power cord from the back of the Roku 4 box for 10 seconds, then plug it back in. Once it comes up, you should see the Roku letters on the screen. Let me know if you can then use the remote and access the MENUs.
Do you see the Roku letters on your screen and can you navigate the MENU please?
I'm unsure why you're unable to reply, but I'm here to assist you if you can let me know where you're at.
No, we don't work in a common office together and I will opt out as well.