> For the complete documentation index, see [llms.txt](https://docs.ndi.video/all/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ndi.video/all/im-having-trouble-with-my-ndi-hx-license.md).

# I'm having trouble with my NDI HX License

To get started you should have received either an NDI Coupon or an NDI HX Upgrade Serial number in an email.

 If it’s a **Coupon Code**, it should be in this format: XXXX- XXXX- XXXX- XXXX

If it’s a **Serial Number**, it should in this format: PXXXXXXXXXXXXXX

If you received a **Coupon Code**, please redeem it in the store by following the next steps. If you have a **Serial Number**, scroll down to follow the instructions under Serial Number.

***

For **Coupon Codes**:

Navigate to <https://ndi.video/camera-upgrades/> to purchase the license for your selected camera. If prompted, create a new account prior to purchasing.

During the purchase process, when asked for payment, use your existing coupon code. Please note that you can only use one code per purchase.

You’ll receive the Serial Number via email that you entered in previously. Take note of that number and launch NDI Studio Monitor from the *NDI Tools suite*. Currently, you’ll need to do this on NDI Studio Monitor for PC only

***

For **Serial Numbers**:

Use Studio Monitor to identify your camera, it should have a prompt that the device can be used as an NDI source and a button should appear on the bottom right to Register

Select the register button, fill in the serial number from Step 5, and register it to activate NDI on your camera

***

At this time, your email receipt is the only record of your license. If you decide to factory reset your camera and lose the license, we cannot recover it without the email receipt and purchase history. Keep the serial number of the camera and upgrade serial number in a safe place. Also, the upgrade serial number is non-transferrable it is only usable on the camera it was purchased for. If you have an issue with your camera, please follow the troubleshooting steps through the camera manufacturer to transfer license to a new camera if applicable.


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