DVD part of CD/DVD RW not working

What would cause the DVD part of a DC/DVD RW to stop working. It still sees and records CD’s but does not see or record DVD’s. We have the newest drivers. We flashed the newest bios all since it stopped working to see if that would fix the problem and it doesn’t. We unistalled and reinstalled it and that didnt help either. It has Windows XP Pro OS if that matters.

Thanks in advance.

All DVD burners (DVD RW drives) use two different lasers for CDs and DVDs. Sounds like the DVD laser has died