Originally Posted by Hypno Toad

Can you direct me to the forum that helped?

I normally don't connect my 510 to the PC, but last night I used the PC since my Bluetooth was being flaky.... BAD CHOICE! My 510 is just a small step better than a brick. Factory reset* did not help. Crazy/basic stuff doesn't work, back light will not stay on, tone keeps turning on, can not create an activity profile (it will not save my changes) - in fact, that is the root problem through out, no changes are saved. The thing has totally lost it's mind. At this point, there is nothing to save on this unit, so a total reformat would be fine.

*I tried: System --> Device Reset --> Factory Reset. Fixed nothing.