[nobrtt]

The issue began just after updating os to lollipop 5.1
Unexpectedly and randomly the alarm start working at highest level sound followed by led light blinking...(this can repeat again after some minutes, hours or days...)
It stops when I removing the pages in the memory and returns later.
n.b, there is no sign for alarm set on top of the screen.

[belodion]

Welcome to the forums.

A Cache Partition wipe after a system update is said by some to be good practice, so perhaps try that. The same is said of a Factory Reset, so as long as your personal data is backed up, you could consider that if the wipe doesn't fix the problem.
These Ambassador guides are worth reading, should you decide on the Reset:

http://forums.androidcentral.com/amb...id-device.html

http://forums.androidcentral.com/amb...p-restore.html

Posted via the Android Central App