Doesnt blink my LED

[24mark24]

ITS just led doesnt work, so it used to press the power button instead of seeing my led blink to see my incoming msg.
I also check the settings and yet doesnt work at all.

I need my led blink again for msg. Purposes
Someone help me.

[24mark24]

Is this the last option.?

[Uliwooly]

if nothing works then you will have to stop by a Sony Xperia Care 

[24mark24]

I do my best.