Originally Posted by mred2000:
“I thought to turn them back on you had to hold in the power button whereas just a single press wouldn't actually turn it on but if it was locked a single press would display the locked screen...
I've only played with the Desire HD, though and my own phone is the Hero but that's what happened on both of those...”
That's also true for the (non-HD) Desire; press the power button briefly - If it's off nothing will happen, if on it comes out of standby. But the HD has Fastboot so it's never really off unless the battery has been removed, so that may not apply.