Macbook Pro won't turn on after trying to boot from USB

Hi guys,
My MBP wasn't getting past the grey logon screen with the Apple logo and the spinning loading gif.
I used Liondisk Maker to boot my copy OSX from a USB and his option when i turned it on again, which eventually loaded to the optional disks, so I clicked on the USB, after a minute or so nothing had happened and my screen just went blank, and the computer turned off.
Now it won't even turn on. It is plugged into the AC aswell.
Any suggestions?
Thanks!

It is now turning on but none of the commands for any boot menus will work?

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Hi. I hope you can help me.
I have a macbook Pro 13", from september 2012, which crashed earlier today:
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https://support.apple.com/en-us/HT201295
Then try a NVRAM reset:
https://support.apple.com/en-us/HT204063
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https://support.apple.com/en-us/HT201262
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Hi. I hope you can help me.
I have a macbook Pro 13", from september 2012, which crashed earlier today:
I was charging my iphone through USBport on my macbook (not an Apple USB-iPhone power-cable) .
My MacBook was charging through the magsafe charger (about 30% power i think).
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The crashing has happened before, when I've been charging my phone through USB connections, but I've always been able to turn my mac back on.
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good afternoon
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