Does anyone know how to disable the blinking power LED when Vista enters hybrid sleep mode? My case has a very bright blue LED that is rather distracting. I'd rather not disable hybrid sleep, as it works perfectly and allows for much faster resumes than restoring from a hibernated state.
No you can't. The blinking is controlled by the motherboard, not control by the OS.
You can try to put some tape to cover the LED or unplug the LED light from the power supply though.