Blinking blue indicator light
My Ally was about 1/3 charged when I looked at it and placed it on my desk. Then when I went 5 mins later to check for any notifications it was off. I freaked thinking it was broken. It wouldn't turn on. I tried the power switch, I tried extending the screen (sometimes screen can freeze and that would awaken it). Nothing. I took the battery out- and replaced it. Still nothing.
I plugged it into an outlet- and it didn't register. I kept it plugged and took the battery out and still nothing. I unplugged it and replugged it (with the batt still out) and then there was a blinking blue light on the indicator.
I was sure the blinking blue light meant it was damaged. I finally reattached the battery and it started up again.
My Ally is only two months old and I'm glad it's working again.