• Make sure that you have the power cord connected to the Nebula device and plugged in to an appropriate power source. Make sure you have the Nebula device turned on. Check all cable connections. See the related Quick Start Guide.

• If the LEDs still do not turn on, you may have a hardware problem. In this case, you should contact your local customer support.

• The Nebula device has a power-related error. Disconnect and reconnect the power cord. Make sure that you are using the included power cord for the Nebula device and it is plugged into an appropriate power source. See the related Quick Start Guide.

• If the LED is still red, you may have a hardware problem. In this case, you should contact your local customer support.

• Check that you are using the correct URL:

• Make sure your computer’s Ethernet card is installed and functioning properly.

• Check that you have Internet access. In your computer, click Start, (All) Programs, Accessories and then Command Prompt. In the Command Prompt window, type ‘ping’ followed by a website such as ‘zyxel.com’. If you get a reply try to ping ‘nebula.zyxel.com’.

• Make sure you are using the correct web browser. Browsers supported are:

• Open your web browser and go to https://nebula.zyxel.com. Sign in with the correct email and password. Click Sign Up if you don't have a myZyxel account and create an account.

• At the time of writing, you can only manage Zyxel Nebula APs, switches or security gateways via the NCC.

• Make sure that you have registered your Nebula devices with the NCC. See Inventory.

• Make sure that you have created an organization and site and add the devices to the site. See Create Organization and Create Site.

• Check that the license has not expired.