If you can, I would try to restart the modem by unplugging the power from the wall, waiting a minute, then plugging it back in. Let it go through its diagnostics, etc. and see if the lights come back on.
If they do, immediately go to http://192.168.0.1 and click on where it says Built-In Self Test. If they don't all say "Passed", please take a screen shot and post it here.
Hopefully this is all you need for now, if not, we'll take it to the next step.
Thanks for posting and welcome to the community! I pulled up your account to investigate and I see you've already spoken with us over the phone and are expecting a tech tomorrow to get you back online. Please let us know how it goes. If you have additional concerns after the tech visit, please don't hesitate to reach back out again. We're here to help.