1. Fatal_Bert's Avatar
    Earlier this week my 521 would not unlock. The screen remained black after pressing the power button. I noticed that holding the camera button would make the typical vibration of opening the camera app, but the screen remained black. If I took out the battery and restarted it worked as usual for about 10min (with lock/unlock function) and then would get stuck either unlockable or with a black screen. If it is stuck unlockable, holding the power button still prompts me to slide to power down. So the button is not physically broken, it's a software thing. How could the power button become uncoupled from the lock function?

    I factory reset the phone and it cured the problem for 2 days, but it has just reverted. Anybody have any ideas? I can't find anyone experiencing anything similar with this phone. Thanks in advance.
    02-08-2014 07:02 PM
  2. rdubmu's Avatar
    I haven't experienced this with my Lumia 920. It sounds like a hardware problem as if it was a software issue it would be more wide spread. Does your phone have any water damage?

    If you bought it recently it should be covered under the manufacture warranty.
    02-09-2014 02:30 AM
  3. Fatal_Bert's Avatar
    Thanks. It hasn't encountered any water damage that I am aware of. Yes, I believe it is covered under warranty. It is just hard for me to go an extended period with no phone at all. At least for now I can use it if I set the lock screen never to time out--the battery just drains prohibitively fast. It may be hardware-related, but the button physically works and is recognized for the function of turning the phone on/off. Seems odd. I'll likely end up sending it in Monday.
    02-09-2014 03:53 AM
  4. Fatal_Bert's Avatar
    Just wanted to leave this with some closure. I factory reset the phone again expecting a temporary fix. I did not restore or import any backed up application data and it has worked fine since. Fingers crossed.

    02-15-2014 04:40 PM

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