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I need to know what operating system you're using (like windows vista). However, it seems like the control has moved to the LG screen, and not laptop. You can set several options when connecting a monitor to a laptop - both screens are available, one screen is off and the other screen is off.
Please post your operating system so that I guide you how to change these settings.
If you do have an NVIDIA graphics card for your computer, you can call Sony support at 1-888-476-6972 and they will process a free repair for it even when your computer is out of warranty. I think your model is included in the known issue.
It sounds like your video GPU may be burnt or have vertical artifacts. You can try to downgrade the video driver, or if you're tech-savy enough, you can underclock it slightly, and that should get rid of the lines. If you have any troubles, repost and i can try to help some more.
Sean Huffstickler
Blue thin lines before it boots will rule out an operating system or driver fault. So it would appear something in the machine has failed.
Do you have a VGA monitor you can connect to it and see whether it shows the fault? This will show that if the fault also shows on the external monitor, it is likely an electronic fault on the main board, whereas if it works on the external monitor but not on the built-in monitor, my guess would be the cable that goes from the main board up through the hinge of the screen into it, or a connector, or an actual fault with the LCD display.
Windows booting normally once the display drivers were disabled indicates to me that Windows is no longer detecting the faulty display and therefore boots normally - possibly pointing to failed electronics in some way. It could even be corrupt BIOS that controls the video or something along these lines, though that's unlikely.
Good luck, either way it sounds like it's off to a computer repair shop. Is it under warranty?
The vertical line is a bad pixel sensor at the edge of the screen, your screen has hundreds of vertical and horizonal pixel sensors. This is an indicator that the screen is going out and need replacing.
I encountered a problem with my sony vaio laptop after installing windows xp. It lost sound and keeps reporting that it does not have sound device when i try to play music.
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