Macbook Air 2012 goes back to Sleep immediately after waking it up
So I have had this 13inch Macbook Pro for about a month and in that time it has done this about twice already. In order to get it working again I have to wake it up the second time and then it works fine.
I have done the SMC and PRAM reset but that does not seem to help. This usally happens when the Mac is connected to a power supply and goes to sleep by itself after some inactivity. Would like to know if anyone is having a similar issue, if so did you found any solution? Thanks in advance. Just to clarify I am working on a 13 inch Macbook Air with 256GB SSD and using Mountian Lion 10.8.
MacBook Air, OS X Mountain Lion, Mid-2012