It sounds like your Tablo is having trouble booting. If power cycling it doesn’t resolve the issue, you could consider a factory reset, which should resolve the issue. However, it’s definitely worth contacting our support team before doing that, as they may be able to help you get it up and running without a reset.
You can send our support team a ticket here, or you can give us a call at 1-844-TABLOTV (822-5688).