15" MBP Not booting up

Hello everyone, just on reading week and trying to get projects done for my graphic design program.
I was doing some travelling and such today and brought my MBP with me, it was doing okay, it was in sleep mode for the drive home.
when i got home, i opened it and everything seemed normal until i realized that i couldnt click on anything adn the battery status indicator had not changed as it should when i plugged the adapter in. basically it was frozen and all i could do was move the mouse pointer.
i hard-reset and when it went to start up, it stayed on the gray screen for too long and when it finally got to the blue screen, the OS X load-up window did not appear and the login window did not appear...
does anyone have an ideas? i've done a PRAM reset, ive taken the battery and power adapter out, held the power button for 5 secs and nothing, ive repaired the disk and permissions...no dice.
i am going to be screwed for my assignments this coming week.

Great, thank Niel, very helpful. Did what you suggested,and tried a restart with no problems.
I was looking at the Apple site, and read a small paragraph regarding removing the Windows partition and possible problem when booting up. THe suggested solution is to go through Boot Camp again, create the partition, reinstall Windows and then get Windows to format the partitioned drive. Once that is done, then one has to go back to Boot Camp, and lick on remove and restore.
The suggestion from Niel sounds a lot quicker and easier, and works!

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Just moving from an HP Win 7 laptop and got a brand new 11' MBP a month ago, which I must say was a bit disappointing in terms of overall performance, as I was clearly expecting more from a Mac.
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http://support.apple.com/kb/ts1367
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Disconnect all accessories that are plugged in to the computer, such as a printer, hub, or other mobile device.
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MacBook Pro: How to remove or install memory
MacBook: How to remove or install memory
Mac Pro: How to remove or install memory
Mac mini: How to remove or install memory
iMac (27-inch, Late 2012): Installing or replacing memory
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And at this stage I seem to have run out of thing to try.
I've made an appointment at the Genius bar but the earliest they could do is Saturday, which is pretty crappy and I'm going travelling in less than 2 weeks, so I really need my Macbook to sort out the details since a lot of info about it is on there exclusively.
Does anyone know any reason why this might have happened?
Why would the battery drain so fast when it was supposed to be sleeping?
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Any suggestions beyond what I've tried already?
If I can't get it working before my Genius appointment, I'll post what happens here just in case any one else has this issue so people will have an idea of what might have happened to them.
Thanks in advance!

olliemilne wrote:
- I've tried holding a bunch of different keys when starting up (cmd+R etc.) but again, nothing.
You could try booting the MBP using the OPTION+COMMAND+R keys and see if it will connect to the Apple servers. This would allow you to install the original OSX . I have my doubts though.
- I've tried something crazy suggested in another thread; leaving the Macbook partially opening and shaking it, which supposedly does something to the "sudden motion sensor".
The Sudden Motion Sensor is applicable for conventional Hard Drives, not the SSD that is in a MBA. Doing that will serve no useful purpose.
You have exhausted all reasonable options and will just have to have the MBA evaluated at the genius bar.
Ciao.

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