Tecra M3: black screen on start, vertical lines on external monitor

Hi all,
I've been searching a lot on the Internet for a solution to this specific problem I have but could not find a thread
with exactly the same problem.I have a Toshiba Tecra M3 with WinXp SP 3. Two weeks ago I encountered problems with starting up. After a couple of times restarting it would work. From then on it became worse... When I try to start up I see no splash.. the screen stays black. If I press the power button I hear the fan and the CD-drive but no screen. It's totally black. I know its working because I can go (blindly) into setup; press end, then Y and then enter. The notebook will restart but still no screen.
I hooked it up to an external monitor. Pressing Fn and F5 enables switching. The external monitor shows different
vertical lines in multiple colours. They change if I go to setup or try to start windows.
Does anyone have a solution to these problems?

Im having a similar problem,
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

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