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1.83、2.0、2.1、 2.16、2.2、または2.4 GHzのいずれかのCore 2 Duoプロセッサーを搭載したModel A1181

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Why does my screen flicker to black at certain angles?

Problem: I just noticed this evening that when closing my laptop, the screen turns black when it reaches a 50-degree angle.

Background: I have a Macbook Core2 Duo that I bought toward the end of 2007. Over the years I've replaced several parts, the latest being the top case when I busted the cable during some maintenance. I know my laptop is old and at some point it's just not worth fixing any more, but I'm currently a Peace Corps volunteer with a year and a half to go and I'd really prefer it if this laptop survives my service.

Theory: I'm guessing a cable is fraying (I have disassembled this to fix the iSight cable twice so I know how twisty the wires get in there). If this is the case then I'm stuck since there's no way I can find a new cable where I am.

Other comments: I have a USB modem to get internet access. The program that must be running in order to go online uses nearly 100% CPU, so the CPU temp is between 180 and 190 degrees F. I've taken to propping the rear of my laptop on a book or roll of tape to maintain some air circulation. Although the book contacts the bottom case, I'm wondering if this puts a strain on the laptop in the hinge area. I don't have any alternative ideas for this, though, because I have to use this ridiculous program with this modem.

Any help, comments, suggestions, &c. are appreciated (even if it's to say I should just suck it up and get a new computer; leaving this Mac would bum me out).

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Can you please supply the last three digits of your serial number so we can better identify which model you have.

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If I'm looking in the right place, the serial number ends in Z64. I know it's a Santa Rosa/Penryn model from going through a repair guide.

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2.2 GHz Core 2 Duo (T7500)

Intro Date: November 1, 2007 Disc Date: February 26, 2008

Order No: MB063LL/B Model No: A1181 (EMC 2200)

Subfamily: Late 2007 Model ID: MacBook3,1

Std RAM: 1 GB Std VRAM: 144 MB

Std Storage: 160 GB (5400 RPM) Std Optical: 8X DL "SuperDrive"

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Depending upon your skill level, you, or a local repair shop, could go over the cable and connection with a magnifying glass looking for nicks, cuts, crimps or bare wire. Examine the connector on the end of the cable for cold solder.

You might be able to prolong component failure with use of a silicone goop as insulator if there's cuts/nicks to the cable. Tightening hinges, taping the cable down might also help if it is cable pinch, or kink, that is causing the problem.

If you do nothing it will get worse.

If this Answer is helpful please remember to return and mark it Accepted.

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Thanks for the info. I think in other situations I'd be willing to try this, but there's no computer repair shop here (rural South America), and the last time I did some repairs the keyboard/trackpad cable broke and I was without a computer for a few weeks until a new top case could be mailed to me from the US. I'm in the middle of a few projects right now, so I can't risk being without my computer.

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Wouldn't have to be computer repair. . . with this sites guides and any competent small electronics repairman's experience/tools/skills you could be ok. If you don't have to tote that box from place to place using an external monitor could be a work around (plan B) sort of thing.

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A common issue with some MacBook's & MacBook Pro's is the inverter & cable that feeds the needed power to the CFL backlights in the LCD. But without knowing which exact model you have I can't be sure that is your problem.

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Brook J さん、ありがとうございました！
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