I have a spare mt4g with a faulty power button, it won't work AT ALL. I used to have to seperate the plastic case from the chrome bezel at the corner of the phone where the power button is located, & touch the spot on the flex ribbon with a piece of foil to get it to power on. But I was happy when I rooted, s-off, engineering bootloader, then flashed CWM 184.108.40.206, because now when I plug the handset in to the charger, it powers up in recovery mode automatically. I don't know if it is supposed to, but I am just tickled to death that it does! I can now consider selling the one that I use daily since everything works on it.
**EDIT** I just checked this one that has 4ext recovery and it don't power up when I plug it in. So if that's a feature that CWM recovery has, its almost worth switching to CWM on this one..ALMOST! I think 4ext is more stable, and just better over all.
Sent from my HTC Glacier using xda premium