Unable to Turn Wifi on

Well .. when i was opening the internet on my phone , it suddenly shut down and when i opened it again the wifi didn't work , i couldnt play the music ..
so i tried to update the software to 5.0.0.9 so everything went back to normal except for the Wifi button ... what i did to try to fix it :

1- updated a new software
2- pulled the battery off for 1 minute
3 did a reboot
4- formatted the device
5- i also went to fix it in a phones store and he told me its dead and need a new hardware and maybe the wifi will not work anymore ever

None of those things worked !! So please tell if this is true and im out of solutions or there still a new solution .

Thanks

This seems to be a common issue,
please read through the searched posts linked below and hopefully you can find your answer.

http://crackberry.com/googlesearch?z...on%209000#1132

i searched more than maybe 50 topics and what i wrote are the solutions that supposed to solve this :S im still searching though hoping to find a solution .
But if u got a quicker option please help me .

Thanks ,