Desire 816 Notification LED

Desire 816 will not flash the led to notify of mail/texts/missed calls, etc.
Have gone to settings>display&gestures>notification light and have appropriate boxes checked, but no led activity at all when receiving these things. Lock screen is not bypassed, have no 3rd party led apps installed. Have done factory reset, which htc said to do, but no good. Anyone else have this issue?
Looked at forum for htc desire, but it said there that solutions may not be appropriate for newer, just released phones, so posting here.

 

fastboot is off and I did another hard factory reset and the LED notification system still does not work. I did a self diagnosis and the LED passed all the tests.

 

thanks I am downloading it now will report back on how it goes.

 

finally it works!

 

mamak: make sure your phone is not on the charger. The led notification doesn't work if the phone is on the charger.
Stupid, but true.