Model A1181 / 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

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Erratic horizontal lines on LCD display

I have a Macbook 13" Early 2008 Dual Core 2 Duo Penryn Model A1181.

Erratic horizontal (white) lines appear at random positions on the LCD display.

A simple pressure on the screen bezel or even a gentle play with the inclination of the screen causes randomly :

- more lines

- or return to a clean display (with no lines).

See attached pics with more and less lines

Block Image

Block Image

(please ignore the glare in middle of screen caused by the camera flash)

note :

- No lines appear using an external display (mini-dvi port) works fine.

- The screen brightness appears fine in any position

Any suggestions on how to investigate this problem and diagnose the cause of the problem ?

Answered! View the answer I have this problem too

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What happens when you use an external display? Is the image on it clean.

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Yes, an external monitor shows a clean image. I guess this means the video card itself is fine.

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Much thanks for your answer !

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Chosen Solution

Since an external display shows a clean image that proves the issue is within the internal display it self. Sounds like you either banged the lid with something or something heavy sat on the lid damaging the fragile connections on the glass.

Time for a new display assembly.

You may want to think over if this system is worth fixing given its age and limitations. You may want to put the money into a new system.

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Understand. One further question : what strikes me is the fact that the screen displays correctly when playing with the lid (adjusting pressure, inclination, etc..). Could this indicate rather an issue with the video cable - ie. it could simply need to be reconnected ?

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Sadly no, the pressure is effecting the glass connections of the driver logic which have broken free. The LVDS cable that interconnects the display to the graphics services on the main logic board uses a signaling system that wouldn't show up this way.

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Ah, here is an insightful answer.

This would corroborate I guess with the fact that recently the screen has started to show white stains that are growing. At times pretty much the whole screen appears white until pressure is applied. It is interesting to understand the actual factors affecting this. So your answers are much appreciated. Best.

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If this answer answered your question please remember to rate (score) and mark it accepted.

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Absolutely. Thanks again. Will now evaluate screen replacement opportunities or use of outside display.

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Dan Mac will be eternally grateful.
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