OK - I just did a Google search and came across this:
[Q] Xoom Won't turn on - xda-developers
Forced reboot - hold the volume up button - down, and then long press the power button.
Seems to be rebooting now.....
Phone = HTC Incredible - rooted as of 2/20/2011 4:18 PM.
Tablet1 = Samsung Galaxy Note 2014 Edition. Old but still working Tablet: Xoom Wi-Fi :: stock, not currently planning to root but probably will eventually
Favorite saying: Beware the lollipop of mediocrity. Lick once and you suck forever.
Gamul = first initial ; middle initial ; first 3 letters of last name