Since upgrading to OSX 10.8 with the 10.8.1 update my mid 2009 MBP heats up like crazy when I close the lid to put it to sleep. The fans run in an on-off pattern and then when I open it I can't touch it.
are you sure nothing like insomnia is running keeping it awake?
nope. Nothing at all. I ran pmset -g assertions and it came up with 0 for everything. I've already reset the SMC and PRAM.
I also noticed that when I keep the lid open and put it to sleep it doesn't go to sleep. The screen will go black for 10 seconds and then wakes up again
2 other things to try make sure nothing is still in the print que, also open activity monitor look for a process called "powerd" if it is kill this and that should allow you to put it to sleep
Check the console for any event messages that give you a clue what is causing your Mac to stay awake. You want to look out fore wake events in the logs.
You find the console under Applications > Utilities
Not even the cables? I read through a german thread were a faulty USB cable was the reason.
Do you use any remote-extension, a la candelair?
OHC1 seems to be the keyboard. Maybe the screen is pushing one key? Or you have a faulty key that wakes up your Mac?