04-17-2013 07:04 PM
Hi and Welcome to the Community!
I recommend that you attempt to boot into Safe Mode:
It may take you multiple attempts to get the ESC key sequence (press/release/hold) correct, so be patient. When successfully into Safe Mode, think carefully...what happened just before this behavior started? A new app? An update? A Theme? Something else? Think carefully as the smallest change could be causal...and attempt to undo whatever that was.
Good luck and let us know!
04-18-2013 09:28 AM
How many times did you try? How many variations from the documented instructions did you try?
I recall one device I had (a 9550, I think) that required
That was the sequence that device needed, and it took considerable experimentation to find it. If you have only tried once or twice, and have not tried any variations, then you may wish to consider doing so.
Otherwise, the recovery methods are more drastic:
Of course, those are only useful if the problem is not hardware. And hardware problems are impossible to truly diagnose at an internet-distance.