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Laptop duplicate display on screen


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geraldwold geraldwold is offline
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10-May-2004, 05:33 PM #1
Laptop duplicate display on screen
Have a Sony PCGF490 which shrinks the image to less than a full display both horizontal and vertical and then partially duplicates this image again, about 2" from the bottom of the display. In Win98 it displays duplicate icons on the display. A 1/2' high horizontal, grey band separates the two images. Happens in Windows 98 or booting from a DOS floppy. Problem starts as soon as I get the Sony logo after post. I temporarily swapped out the display and inverter with a display from a Sony PCGF430 (slightly smaller display) and the problem went away. Thinking the 490 LCD was defective, I ordered a replacement but still have the same problem. An external monitor does not exhibit the same problem. The internal LCD cable 'appears' intact. Any good ideas? Thanks, Jerry
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11-May-2004, 02:52 AM #2
Check the refresh rates. This sounds to me like the scannining is out on the laptop screen.

Last edited by DaveBurnett; 11-May-2004 at 03:02 AM..
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geraldwold geraldwold is offline
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11-May-2004, 08:48 AM #3
Thanks for the reply. I don't find any reference to refresh rates in the bios setup. Since it happens even if I boot to a DOS 5.0 floppy, it looks like a hardware issue. Still open to any suggestions out there! Thanks, Jerry
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11-May-2004, 11:31 AM #4
On my laptop (different make) there is a set of dip switches under the keyboard that need to be set correctly for the type of screen.
It will happen in DOS. The default will apply until the video card drivers become active.
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geraldwold geraldwold is offline
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11-May-2004, 01:54 PM #5
Dave, thanks for 'hangin in there' with the followup reply. I took a closer look at the LCD cable under magnification and discovered a trace near the connector that had lifted up. I swapped out this cable with a similar one & the problem was resolved. Thanks again. Jerry
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