LCD problem diagnosis help

April 27, 2009 at 16:52:14
Specs: Linux (Ubuntu 8)

For starters: I have a Dell Inspiron 640m.

A month or two ago, my laptop's LCD started doing a strange thing that I've termed, "eating itself." The display will suddenly stop refreshing, a blob-like section of pixels will all turn blue and then expand outward in an interesting and visually appealing cascade of colors, until the entire screen is just a wash of colors.

I used to be able to "fix" the problem, by light pressing the bottom right hand corner of the front LCD bevel... or closing and opening the laptop lid. Eventually, it died. The LCD would refresh once or twice, and then the image would be static, until eventually it started to eat itself again. I attempted to reseat connections, but this seemed to only make the problem worse... and brings us to our current situation:

The LCD backlight is on, but I get no video to the LCD.

I've run the Dell diagnostics on the laptop and get the following error:

2000-0321 Unable to detect LCD

I've currently got the diagnostics still running, and the laptop is connected to an external monitor. Other than this LCD issue, it functions normally.

I replaced the LCD and the cable connecting the LCD to the motherboard/videocard or whatever it connects to. Any suggestions?

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April 27, 2009 at 18:53:58
When you say that you replaced the LCD, do you mean that you put in a spare identical one and still have the same issue?
I have had the same problem. The screen began to come apart on the side where the actual LCD met its terminals along the side of the lid. I had a clothes-hanger-paperclip applying pressure to the corner of my screen for weeks til I got it replaced.

The Beginner

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April 27, 2009 at 21:39:50
I mean that I ordered a new LCD and installed it and had the same issue. I'm not really sure what else to try. The bevel on mine broke on that side as well. Strange.

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