Thanks in advance.

Well i have a laptop of IBM thinkpad x32. Windowx xp installed.

So,
the problem is that:

The basic problem is the Black Screen but it's not means that laptop doesn't power-up or boot-up, sometimes after booting, screen will off and notable thing is that after black screen computer is still running all keyboard lights are on, and when i tried to again start it, it will boot ok but after some time screen will gone, and sometimes this happens during booting screen, even sometimes screen black out at win XP user login page, means after some seconds or min screen will gone.

Hope you can understand my problem