There are two reasons for such. Since you posted in the HARDWARE FORUM, you need to run a HARDWARE TEST to make sure your HARDWARE is good to go. The great news is that a very small CD image is needed to do the test.
Here's how -> Look up GEEXBOX on google.com Make the boot CD and boot it. Does it play DVDs?
If that works, I'd post in the Forum that matches your OS, and this time do not neglect the Forum Tip about telling what OS your machine is running as well as all the gritty details about the machine and if you know how to install Windows OS (is that what you run?)
Many don't know that Microsoft didn't program Windows to fetch and install updated BIOS and drivers.
I can play cd's in my dvd burner, but when i put in any dvd, it will freeze after a few seconds, and i will need to manually shut it down. can anyone help please?