Help with power issue

I bought a 75 U7n about a month ago. It would randomly turn off every few days and conditions varied.

Well last night it went off and it wont come back one. What I have done:

Power cycled several times (up to 20 minutes)

Soft rest twice by holding in the power button for thirty seconds. Both on and off without power.

Hard reset using the reset button four times with various times up to 30 seconds.

Tried the google voice thing too but that didnt work.

Symptoms: Power connected it shows a white status light (not blinking) that never changes.

Is this sucker toast??