Resolved! (my issue, which from reading this whole forum may or may not be the same as some people's)
EQUIPMENT: Macbook Pro 13" Mid 2012 (Non Retina), 8GB, Intel SSD, Video card Intel 4000.
OS: Maverick
PROBLEM: Computer would not turn on after shutting it down. I would press the power button and nothing would happen, no DVD noise or screen - nothing, nada, caput!
If I waited at least 20 minutes and tried again the laptop would start. Also, once started computer would work fine. I could even put it to sleep and it would wake up fine. But, It did not wake up from deep sleep (hibernation?).
SOLUTION: After trying many things cited here in the forum; using the original 4GB memory, testing with a different SSD, doing the "Repair Permissions" dance - nothing. Also tried re-installing Maverick from scratch - nothing.
So, took the dog for a walk, came back and set the resolution to "Scaled" to its highest resolution 1280x800 and voila! - darn thing seems to be working. I have tested this for more than 7 off/on cycles before posting.
Btw, this is the 2nd major problem i have had with Apple Products, the first one was with my iMac 27, mid 2011, where suddenly the screen started pixelating. That issue also turned out to be the video card nVidia 6970M and interestingly enough, the issue diminished when I set the resolution much lower. Eventually Apple finally found the issue was a bad card and did a recall. Ofcourse by then I had bought a cheaper video card.
Anyway, I love Apple computers but it is certainly not re-assuring to hit these problems.
I scheduled an appt with the genius bar for Tuesday, to see what they can find.
Happy New Year!!
/g