Currently Being ModeratedJul 25, 2013 6:52 AM (in response to flashfromthesnapshot)
Read and follow all the steps.
A battery that has been left completely discharged for a prolonged period of time may be completely dead, unable to be recharged ever again. In that event it can be replaced in accordance with Step 6.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!
Currently Being ModeratedJul 25, 2013 6:59 AM (in response to John Galt)
weirdly I just took the battery out a few times and kept putting it back in, and also unplugged and replugged the charger a few times, and it has now started up and is working! Thanks for replying with your help anyway, much appreciated!