Possible cause: 1. Video card failure. 1. First of all, test the laptop video output on the external monitor. If you see same flashing lines running through the image on the external monitor, you have a problem with the video card. If flashing lines appear only on the laptop screen, the failure is not related to the video card. 2. Just in case, try re-seating the video cable connectors on the motherboard/video card and maybe the back of the LCD screen. It' s not likely but possible that connection is loose and reconnecting the cable will fix the flashing lines. 3. If re-seating the cable connectors doesn't help, most likely you have a faulty LCD screen. The LCD screen has to be replaced. 4. If replacing the screen doesn't help, try replacing the video cable. It's very unlikely that this problem is related to the video cable but there is a slight possibility of that.
2. Bad connection between video cable and LCD screen.
3. Bad LCD screen.
4. Faulty video cable.
Possible troubleshooting steps and repair solution:
Dear Valued Sony VAIO customers,
Sony has identified a limited number of VGN-CS series computers which may display a horizontal line on the LCD screen.
Applicable Models
As part of our commitment to quality, for an additional 24 months beyond the standard limited warranty period, owners of an affected model displaying the symptom may be eligible to receive service for the LCD screen from Sony free of charge.
If you are currently experiencing this issue, please contact us at 1-888-476-6972 to arrange service.
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