Why won't the camera turn on?
There is no display on the screen and buttons do not respond to user input.
The Samsung HMX-QF20 is a portable camcorder with 1080p HD recording, 20x optical zoom, and 5.1M. It also includes wireless capability for sharing and uploading content, HDMI compatibility and tripod access.
It's possible that the camera isn't charged, in which case you would need to plug the power cable into the charging slot on the camera. Check the connection to make sure that the camera is receiving a charge, and if not, your problem is probably with the battery. The battery can be bought and replaced online. iFixit gives a good troubleshooting guide here: Samsung HMX-QF20 Troubleshooting