Out of the blue one of my systems started locking up resuming from standby, not hibernation. Anyways it didn't do it before and now its locking up so hard that holding the power button doesn't work, and to even get it to start again I have to pull the cmos battery out and put it back in. Not sure whats going on here, but its driving me nuts! Any ideas? *Besides the obvious turn off standby* System- Asus P5Ld2 E6420 *Mainboard might be bad somewhere?* I also turned off ALL thermal control and the voltage is a nice steady 1.3 so its not a lack of power. Power supply checks all good and is more than plenty large enough for the system.