My early 2011, 15" MBP has a difficult time booting if it's been shutdown for awhile or slept for awhile. I say awhile and not a specific time, because generally i'll shut it down come back in a few days, or recently I slept it the next day turned it on. Today I woke it from sleep, left it alone for a while lid up, returned in 1.5 hrs and it wouldn't turn on. So, it appears to be random but almost everytime I shut it down and come back a few days later it has trouble. Press power button - single light flash. Battery has full juice - all lights on battery indicator, none flash. Tried with power connected - also tried with battery removed and power connected. When it does boot I get the transparent gray screen with the progress bars at the bottom - then boots. Reset PRAM and SMC - does nothing. 15" Early 2011 MBP, 2.2GH i7, 16GB, Intel 3000 512MB, 512GB SSD, 10.11 Beta. It seems to boot if I let it sit in my lap for a while (maybe it warms up?) Last time I tried to wake from sleep I tried to boot a bunch then closed the lid and opened then it power on. I haven't done any thorough testing with any specific steps. Any thoughts, i'm scared of the logic board being the issue, I can provide any logs or whatever info is needed.