Question [Q] Note 2 N7100 not start up !

Hello,

I bought my note 2 three months ago & It did very well untill 2 days ago

My note 2 had a lagging & hanging issues yesterday and I had to restart it many times when it didnt repond , I thought it may be a virus so I did scans using 3 different antiviruses and was clean , then I thought it may be a bad app. so I uninstalled some of recent installed apps but no improvement ! I even removed some of videos to decrease the memory and get the sd card and the sim card out , but also no improvement !!

P.S. The phone was some times previously give me a crashed touch wiz home messages and some apps were crashed also , so I guessed it may be the launcher so I tried other launchers or may be the apps & uninstalled them but still I found the same problem .

So I got bored & went to sleep with the phone very laggy but working for some time after each restart

When I woke up today , I found the phone turned off , I tried to switch it on , but No Response at all !!! only the small red light near the front camera is fluctuating when I try to switch it on !!!
I removed the battery and tried every thing but NO RESPONSE !!!!

P.S. it`s on stock ROM with 4.1.1 JB

PLZ ppl help me