Black lit screen and unresponsive on start up

My mid-'13 (purchased October '13) 11" MacBook Air turns on but only to a black lit screen (no curser etc), the keyboard seems unresponsive and when I close it, the Apple is still lit up. Been like this for 4 days and no change. Fully charged. Running on Yosemite as of last week. Has suffered from the screen going off and freezing for a few seconds from time to time.

Hi Harrisongaw,
Thanks for visiting Apple Support Communities.
I know it can be worrying when your computer doesn't start up. If your MacBook Air is only starting up to a blank screen, but the Apple icon is still illuminated, I recommend resetting the system management controller (SMC) as a first step.
You can find the steps to reset the SMC for your model MacBook Air at this page:
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
All the best,
Jeremy

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Hi jayla_mora,
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It sounds like your iPhone screen is going blank and not responding.
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Black lit screen and unresponsive on start up

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