I have a Toshiba Satelite M200 laptop when i Power on it after sometime it hangs anywhere screen white. i have change its Ram, H.d.d and dvd rom also but problem same.
Pl give me solutions
Since you change the RAM, HDD.
Then it seems to be problem related to drivers.
Update windows from windows update, install the latest drivers from toshiba website.
or
when the system hangs, reboot:
Go to safe mode, view system logs hopefully you'll be able to track the application hanging the system.
(on a personal note, I too have an M200. I do get this sort of problem time to time. Hint is buggy wifi hardware used, and driver issues with display card)
If you wanna discard hardware problems and see if your problems are drivers, use an Ubuntu Live CD, just put it inside, use it, and if your computer doesn't hangs up, then it's a drivers problem, if still hangs with Ubuntu Live CD, then it's a hardware problem, maybe from the motherboard.
First have a look at the system log application/event causing problem.
second
Change the medium of installation, means if you have one CD/DVD try installing from another
With toshiba it is normally the display driver or the wifi causing these problems.