Good day @Linux,
Welcome to TPG Community!
I checked the account and learned that you were able to contact our Tech team last night and was informed to monitor the connection and give us a picture of your modem once the service dropped again.
You can post the pictures here so we could help our Tech team to assess the issue that you are experiencing.
I have done a remote test and was not able to detect any issues on the NBN network. Since you notice that almost all of the light on the modem was turned off when the service dropped, there's a possibility that the issue is happening on your own router or modem. If you have another router to try, it will help us narrow down the issue.
Keep us posted with any update.
Kind regards,
