My nokia Lumia 1520 does not see Roku streaming stick when I try to use mirroring.

1.Connect the Roku Stick to the HDMI port on your TV.
2.If your Roku player has an Ethernet port, you can use the Ethernet 3.cable to connect the Roku player to your router.
4.Insert the batteries to your Remote carefully.
5.Connect the power to the Roku player and connect the power adapter to the electric outlet.
6.Choose the language when the Roku player is turned on.
7.Choose your wireless network from the list then connect your Roku player to the internet.
8.Once connected your Roku player will download the latest version software.
9.Create a Roku account and activate your Roku player.
After creating you can log into your streaming device to enjoy watching your favorite channels on Roku.

Sounds like you have a bad connection on either your roku stick or your HDMI PORT.Does you ROKU stick show a white light if not check power cable or electrical plug.
Try wiggling ROKU stick just a hair or push it in and out until you get a signal..A purple screen with the words ROKU should show up on TV.If you have a bad port on TV it would have to be replaced but this is rare,if you have a second port on tv try that.Have you tried your ROKU stick on another tv?Does your streaming stick go in vertically or horizontally,if it goes in vertically it may be pressing against side of tv prohibiting a good connection.You could try a HDMI cable, plug the HDMI cable into tv and put ROKU in other side of cable.There is also a restart button on ROKU stick push it and it will start blinking,if it doesn't light up you may have a defective ROKU stick.

Roku® Streaming Stick® offers all the channels through HDMI

https://www.roku.com/products/streaming-stick

Roku, Inc.The small size of the Roku® Streaming Stick® means you can easily plug it into ...Roku Search makes it easy to find what's on, where you can watch it for free, ... At a wifi-enabled hotel or dorm room, just use your connected device to sign in ...

Roku Streaming Stick® (HDMI® Version) (Model 3500 ...

https://support.roku.com/.../208754808-Roku-Streaming-Stick...

Roku, Inc.Connect your player Step 1: Insert the Roku Streaming Stick (HDMI Version) (Model 3500) into an available HDMI port of the TV. ...

Roku Streaming Stick Review & Demo - YouTube

? 5:03
https://www.youtube.com/watch?v=mSqMMJSPkBU
Oct 29, 2012 - Uploaded by totalhtpc
Many described the Roku Streaming Stick as one of the most promising ... My Tv does not have MHL port how to use thisRoku stick? thank you.

Roku Streaming Stick® (HDMI® Version) (Model 3500 ...

https://support.roku.com/.../208754808-Roku-Streaming-Stick...

Roku, Inc.Connect your player Step 1: Insert the Roku Streaming Stick (HDMI Version) (Model 3500) into an available HDMI port of the TV. ...Missing: jailbreak

Roku® Streaming Stick® offers all the channels through HDMI

https://www.roku.com/products/streaming-stick

Roku, Inc.The small size of the Roku® Streaming Stick® means you can easily plug it into just about any TV with HDMI® and start streaming your favorite content. ... (for remote); USB power cable + wall adapter; Get started guide; Special content offers.Missing: jailbreak

Roku Streaming Stick channels - YouTube

Try connecting it to the television :>)

Once you plug the Roku Streaming Stick into an HDMI port and connect the micro USB port to either your HDTV's USB port or the included USB wall adapter, you can set up your viewing experience just like with any other Roku product. It's a very simple process, similar to authorizing a device to access Netflix: The Streaming Stick prompts you with a code you enter on Roku's Web site to link your account to it. After that's done, you can add content channels (or restore your channel list from a previous Roku device) to the Streaming Stick either through the Roku Web site or the on-screen channel store.

Read the article here

Roku Streaming Stick HDMI Version

The parts are here: http://www.parts4repair.com/dock-charging-port-for-nokia-lumia-810-t-mobile-version/ There are special tools needed.

Try to make a Factory Reset
See video



How to Reset Nokia Lumia 1520 to Factory Settings


or this one

How To Hard Reset Nokia Lumia 1520

Go into settings on your tv & activate the wireless mode

did you reset your phone ??

You can try to access https://owner.roku.com/link and you will be able to find " Please enter the link code from your TV"