What are some reasons why my screen might be shutting off on its own?

my laptop runs great and is 4 years old. its battery lasts 2.5 hours+ when fully charged, but as of 1 week ago its been experiencing screen problems. it seems this error could be fixed one of two ways, either by closing the laptop and allowing it to restart and also by turning the contrast all the way down and then increasing the brightness only slightly. tech support at best buy (where i have insurance on my ipad) told me it seems there might be a loose hinge and/or the screen's led light might be giving out, and that such a repair would require a screen replacement that would run me $500-$600 since my macbook is an older model. i need your help!

I would recommend against using Best Buy for support. Frankly they are clueless most of the time.
Contact Apple using www.apple.com/support/contact if you are in a country that supports it or call the appropriate phone number on this page. Alternatively carry the MacBook in to an Apple retail store or service provider to ask for an estimate.

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Hi Diego,
- The first time that was put online, it became as w-online and take CPE (The DHCP assigned IP addresses both, Modem and CPE)- But it did not work, so I reset the modem, and went online again, (but did not have a CPE IP address)
I'm not following you here. In the first point you mentioned that the modem came w-online and the CPE got an IP. However, in the second point, you mentioned that it didn't work and then you reset the modem. What didn't work (I understood the problem was CPE getting IP address which, as you mentioned, was done on the first point)?
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support.apple.com/kb/ht1414

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I am using final cut express. It seems that any clip over a certain length, say 5 min, does not fully transfer! All shorter clips are perfectly fine. Is there some reason why longer clips are not fully transferred? (a half blue circle shows up on the tran

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the format of the source footage
digital via ext flash memory. Frame size :1929X1080 / 25fps
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SONY HXR NX5
how you are connecting to the computer
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4
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10.6.8
what model Mac
macbook Pro intel Core i7
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What are some reasons why my screen might be shutting off on its own?

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