ok so i have a new problem here... here it goes..
1] After checking my sisters battery in my N900 it doesnt boot.
2] tried charging my N900's battery in other phone and battery charged as normal.
3] after charging i brought my battery back to my n900 and tried to start but no boot
4] tried connecting charger and got yellow steady light.. one more time i'm stucked..

any idea now?...

do i need to flash, if yes then only rootfs or both rootfs and emmc as per my study..

thanks in advance.