Hi @rokeby3015 ,
Welcome to TPG Community!
We've created an article for the NBN HFC General Setup.
If you can confirm that the cables are on the right port, then try to press the reset button on the NBN NTD Box (Arris Box) and your TP-Link modem for 30 secs each.
Once done, observe the lights on both devices as the NBN NTD box should show all solid lights. The TP-Link modem will configure itself and shoukd provide internet service after a few minutes.
If the internet light is still not showing on the modem, please get back to us and will run further test with your NBN service.
Hi @rokeby3015, we'd like to know if you have already set up the equipment properly.
Should you need further assistance, please PM us your best contact number and most convenient time to receive a call.
To send a PM, please refer to this link: How do I private message (PM) in the community - TPG Community
Thanks for providing your contact details via PM, @rokeby3015.
We have arranged a technical specialist to contact you tomorrow, between 9am and 12pm NSW time for further troubleshooting.
Let us know should you need any assistance. Thank you.