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Macbook Pro - Vertical lines on bottom 2/3rds
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Fresh-Faced Recruit
Join Date: Aug 2011
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Last week I was on my MBP (late 2006 - Model A1211) when the bottom 2/3rds of the screen distorted vertically and then went to a straight vertical coloration. Now when the computer is turned on, it will do the same thing. The bottom 2/3rds of the screen will be vertically stretched and by the time the login screen appears, it will have the vertical line coloration (picture attached).
I plugged in a projector to check the GPU and the image on the laptop screen corrected itself while the projector was plugged in. Neither showed signs of distortion. However, soon after the projector was unplugged, the laptop screen no longer worked correctly. I just tried replacing the LVDS Display cable and the problem persists. Is a full LCD replacement required?
MacBook Pro A1211
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Professional Poster
Join Date: Mar 2004
Location: UK
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MacBook 2.0GHz CD; MacBook Pro 15" 2.4GHz Late '08; PowerMac G4 MDD Dual 1GHz; 3x Xserve G4 1GHz; Mac Mini 2GHz; Big pile of broken and working bits;
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Moderator  Join Date: Oct 2001
Location: San Jose, CA
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No, this is not a panel problem. It is the GPU. The pattern you are seeing indicates scrambled VRAM usually due to a dying or overheating GPU, not a problem with the display or cable. The screen worked with an external projector probably because the VRAM was split between the internal and external display. If you run some graphic application like a game with the external projector connected, it will probably fail as well.
Sorry, sounds like a new logic board or new computer is in order.
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Professional Poster
Join Date: Mar 2004
Location: UK
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Run the hardware test if you have it.
You might also try it with the lid closed and an external. No patterns = bad LCD. No hardware test fail = bad LCD.
(Last edited by Waragainstsleep; Aug 14, 2011 at 05:34 PM.
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MacBook 2.0GHz CD; MacBook Pro 15" 2.4GHz Late '08; PowerMac G4 MDD Dual 1GHz; 3x Xserve G4 1GHz; Mac Mini 2GHz; Big pile of broken and working bits;
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Moderator Join Date: Oct 2001
Location: San Jose, CA
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I can pretty much guarantee this is not a panel problem. Video and memory were my areas of expertise when I worked at Apple, and I've seen this happen with bad GPUs all the time.
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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