Tecra M3 - black and white dots

Im problem with My Tecra M3,
I get the Toshiba logo come up fine.
Then a bunch of black and white dots, (its windows when has crashed and gives you option in safe mode) but you cant make out any of the text, I only know this because Ive delt with computers crashed before.
When windows XP SP 2 starts up basically there are white bar like dots vertically up and down the screen.
Then finaly goes blue screen of death and restarts.
I have changed HDD with my old operating system so its not a virus, Ive taken out the ram, which is 2 x 1gb sticks.
Ive tested them individualy and together yet I still get the same problem I mentioned above when I start my computer.
So its not the HDD or a virus, its not the ram, what is the problem here? The monitor looks fine with the toshiba logo (no dots up and down)
What do I need to fix it ? Whats broken?
Anyone who can help much apprciated.
cheers

Why you post 2 times in different threads about the same issue???
check this:
http://forums.computers.toshiba-europe.com/forums//message.jspa?messageID=182726

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