The warranty returns from Arizer is really simple. You email them telling them then you answer a few questions they ask then they tell you to ship it to them (you pay) you need to put serial number on every side of box. Then within a short time they email you back and send a replacement or fixed unit. I had one unit sent back then my second unit was on the recall list and got problem fixed both times without hassle.
Also did you check and make sure your unit is not one on the recall list?
if so you can get a new unit with all accessories free.