Should the blue power light stay on. Mine isn't

My tablo quite working tonight. I unplugged and replugged, the blue light comes on, flashes slowly then after about 30 seconds the light dims and just goes away. The only way to get it back on is to unplyug and reply the Tablo 4 way again. I thought the power (blue light0 should stay on all the time.
Is my unit wacked?

It depends on whether you have Settings -> LCD checked or not. If it is unchecked, the light only comes on when powering on (there may be more, but it will be off for regular operation).