12 rMB intermittently won't wake from sleep or turn on
So this is very odd!
I have a 12 inch retina MacBook (OS 10.11.1). When is been sleeping for a while or even shut down for a while (i.e. a few hours) it won't wake from sleep or power on after pressing the power button. When its like this if you plug in/un-plug the power cable it chimes in acknowledgement of the power cable being plugged in but it won't power on. It then powers on after about half an hour. When it does power on the battery is at 100%. I've tried resetting the SMC. I'll take it into an Apple store but there's a 2 week wait at the moment.
In the interim any ideas?
MacBook (Retina, 12-inch, Early 2015), OS X El Capitan (10.11.1)