Hi, I´m having the same problem.
My Z68XP-UD4 (rev 1.0 BIOS F6e) is not working for Windows 7 suspension.
My computer goes to S3 sleep, but when it wakes up nothing apears in the screen. Fans and HD are powered on, but nothing else happens.
When I press the power button for 4 secs and then power on the computer, It does the same describen before in this thread:
Fans, LEDs and HDs starts for 4 secs and then power off for other 4 secs, then power on, power off, power on, power off and then the compuer starts.
The number of times vary between 2 and 4. Some times the screen shows the BIOS post and the message "Waiting for ME ready... 9 8 7 6 5 ... 1 0" apears.
I have downgrade the BIOS from F6e (beta) to F5, but no changes.
Thank you.