My computer won

My MacBook Pro won't turn on at all. I knew it was low on battery when I had last used it, so I attempted to charge it but it still wouldn't turn on. Does anyone know what might be the cause of this? Thanks!

http://support.apple.com/kb/ts1367

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    4. Same as step 3, but open the “Security Options....” and choose “Zero Out Data” before click Erase. It will take 1 to 2 hours to complete.
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    Go to folder “My Computer”
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    http://discussions.apple.com/thread.jspa?threadID=501330&tstart=0
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    http://discussions.apple.com/thread.jspa?messageID=2364921&#2364921
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    You need to restart your iPod before putting it into Diagnostic Mode. Check that your hold switch is off by sliding the switch away from the headphone jack. Toggle it on and off to be safe.
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    iPod 4G+ (includes Photo, Nano, Video, and Mini): "Menu" and "Select"
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    iPod 4G+ (includes Photo, Nano, Video, and Mini): "Back" and "Select"
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    Consider setting up a mail-in repair for your iPod http://depot.info.apple.com/ipod/
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    Your iPod warranty is expired
    You don’t want to pay any service charges
    You are prepared to buy a new one
    You can’t accept the re-sell value of your broken iPod
    Rather than leave your iPod as paper-weight or throw it away.
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    Warning !!!! – It may or may not manage to solve your problem, and with a risk that you may further damage your iPod, which end up as an expensive paper weight or you need to pay more higher repairing cost. Therefore, please re-consider again whether you want to try the next level
    Last Resort Level
    1. . Disconnecting the Hard Drive and battery inside the iPod – Warning !! Your iPod warranty will be waived once you open the iPod.
    In Hong Kong there are some electronic shops offering an iPod service for Sad iPod, the first thing they do is to open up the iPod’s case and disconnecting the battery and the Hard Drive from the main board of the iPod. Wait for 5-10 minutes and reconnecting them back. The reason behind which I can think of is to do a fully reset of a processor of the iPod. In case you want do it itself and you believe that you are good on fixing the electronics devices and have experience to deal with small bits of electronic parts, then you can read the following of how to open the iPod case for battery and HDD replacement (with Quicktimes)
    http://eshop.macsales.com/tech_center/index.cfm?page=Video/directory.html
    2.Press the reset button on the Hard Drive inside the iPod – Suggestion from Kill8joy
    http://discussions.apple.com/thread.jspa?messageID=2438774#2438774
    Have I tried these myself? No, I am afraid to do it myself as I am squeamish about tinkering inside electronic devices, I have few experiences that either I broke the parts (which are normally tiny or fragile) or failed to put the parts back to the main case. Therefore, I agree with suggestion to have it fixed by a Pro.
    2. Do a search on Google and some topics on this discussion forum about “Sad iPod”
    What should I do with my iPod? Send it or keep it?
    http://discussions.apple.com/thread.jspa?threadID=469080&tstart=0
    Strange error on iPod (probably death)
    http://discussions.apple.com/thread.jspa?threadID=435160&start=0&tstart=0
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    http://discussions.apple.com/thread.jspa?threadID=336342&start=0&tstart=0
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    http://askpang.typepad.com/relevanthistory/2004/11/meeting_thesad.html#comment-10519524
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    http://discussions.apple.com/thread.jspa?messageID=2236095#2236095
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    http://discussions.apple.com/thread.jspa?messageID=2233746#2233746
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    http://discussions.apple.com/message.jspa?messageID=2235623#2235623
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    http://discussions.apple.com/thread.jspa?messageID=2237714#2237714
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    http://discussions.apple.com/thread.jspa?messageID=2242018#2242018
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    http://discussions.apple.com/thread.jspa?threadID=412033&tstart=0
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    http://discussions.apple.com/thread.jspa?messageID=2420150#2420150
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