That means the box doesn't boot.
Do you have an internal HDD? If so, let the box run for half an hour or so. It is possible that something is wrong with the HDD (or that Linux thinks there is) and that a check is being carried out. That can take quite a while.
If you have no internal HDD, and are sure that no external devices are connected, then only a bootlog can shed some light. You would need a serial cable for that.