Default WIFI not turning "ON"

I have been breaking my head since a while on this...the WIFI wont turn "on" on my does sometimes..but thats like 1 in a 50 attempts. I tried various ROMS as well stock ROM V2,V3, & flying sparrow etc...nothing helps. Not sure what else I can do. Also tried few tools like WIFI FIxer etc, but the issue remains the same..

Any pointers?