Question : How to fix the problem the vertical line on Boot Screen?

Hello Experts,

I have an unusual issue with vertical blue line. See details below:

How did it happen:

When i was playing game on my laptop, it went blank immediately, then i restarted the computer, in the boot up screen, it appeared Sony Viao logo but trend of blue line dotted vertical line across the screen. It did show the window vista loading bar then after that it become blank.

Alternative Attempt:
There are lot of option in command prompt such as safemode, Repair option, continue window normal and the rest. Safemode is working effectively but normal become blank. When the screensaver appeared in Safemode, it said "The screen saver can't run beacuse it requires a newer video card or one that's compatible with Direct3D".

Check:
I have checked with Device manager, no explanation yellow mark there. It all clear.

Hardware details:

LAPTOP: Sony Viao VGN FZ21E

OS: WINDOW VISTA SP2

RAM: 2GB

PRC: INTEL CENTRINO DUO

GRAPHIC CARD: NVIDIA GeFORCE 8400M GT

I will look forward hearing your response. Thanks

Answer : How to fix the problem the vertical line on Boot Screen?

I dug a little deeper and it seems your GPU is the G86 Mobile chip.
Those are accused of being defective as shipped from nVidia.
http://www.google.com/#hl=en&source=hp&q=Nvidia+G86+Mobile+defective&btnG=Google+Search&aq=f&aqi=&oq=Nvidia+G86+Mobile+defective&fp=b36c7832dbb01be6
This is affecting every brand of laptop, not just Sony.

I would go after [complain to] Sony about them selling you a Laptop with a defective GPU that they now know is defective and have not done a recall for [as an honest and honorable company would have].
- If your tone is right you can probably get them to repair or replace it.
http://www.semiaccurate.com/2009/08/10/sony-admits-14-defective-nvidia-notebooks/