Unable to turn on flex streaming box

How do I turn on the flex box without the remote? I keep unplugging and re plugging the device and itll turn on for a few seconds then shut off. Itll have the “Hello” pop up, but cuts off after shortly after. I had to replace my remote because the other one was lost, but unable to pair the new remote because the box won’t turn on. Will I need to order a new box?