My xoom has completely stopped working. I was using the browser when the problems first started. Websites would not load, the progress bar would go about halfway across the screen and then stop. A few minutes later the browser completely froze up. I tried the home button but nothing responded so I tried to power the xoom off but it seemed to do nothing. Then about 30 seconds later the xoom seems to have powered down but wont turn on.the battery was at around 75% last I checked it and I haven't tried rooting or doing anything that would have voided the warranty. Any ideas as to what I should do?