[q] htc hd7 didin't turn on topic

I have found a HTC HD7 in my house and tried to turn it on. As I press the lock button it response nothing at all but as I simultaneously press the camera button it suddenly vibrate for a sec. Same goes when I connect the phone to a computer. I don't know how and what to do to switch it on. It's not worthy to put in a trash can.

The phone broke last year when it suddenly failed to switch on after the battery drained. Help me please :rolleyes: