Is it a CD/DVD ROM drive?
If so, have you tried any other CD's in the drive and do they work, and any other DVD's in the drive, and if so do they work?
If you have separate CD and DVD drives, do both drives work normally?
Is your drive, (or are they), CDR/DVDR or standard CD/DVD. What I mean is, is/are the drive(s) recordable drives, or standard non recordable drives?
(This gets complicated).
Is anyone else able to open the DVD your son made?
I think you need to establish whether it is the drive itself that is not working, or the DVD disk.
I am given to understand that, when a CD is burned, if the person burning the CD does not finalise the session, (the burning session), then only other CDR (CD Recordable) drives or CDR/RW (CD Recordable or Re-writable) drives can read the disk. A normal CD drive will not be able to see any data on the disks.
I found the article below at this web site;
"When a CD is full or if you do not want to write any more data to it, you must 'close' or 'finalise' the disc. This prevents any more sessions being written to it and allows a standard CD-ROM drive or audio player to read the disc (the restrictions about a player reading multi-session audio CDs still apply, of course). CD writing software will ask if you want to close a disc, so it's not a special process you have to instigate. To get a wee bit more technical, just so you understand what's going on underneath the hood, a typical CD-R consists of a lead-in section which contains the TOC, the data area where program data or audio tracks are stored, and the lead-out which doesn't have anything of interest in it. On an open disc - that is, one which has not been closed - the lead-in and lead-out have not yet been written. If you leave a session open (you can have open sessions as well as open discs), the TOC is written into an area of the disc called the PMA (Program Memory Area). In spite of its name it is a physical part of the CD, not an area of RAM. A CD-R drive knows where the PMA is and so can read it. Standard CD drives and audio players cannot access the PMA and won't be able to see any data or audio tracks. When the session is closed, the contents of the PMA are written to the TOC so the drives can read them. When you write a multi-session disc the software includes a link from the lead in (TOC) of the current session to the lead in of the next session. Multi-session CD-ROM drives can follow the links to find any of the files on the CD. Standard players don't know about linked lead ins and can only find the data in the first session."
I don't know if this applies to DVD as well. I suspect it does.
A lot of work for you to find out I'm afraid.
My son burned jpeg files of his wedding on a DVD, there are 530 of them. I have a DVD drive but it refuses to see the files or that the CD is even there. I have tried this on two seperate computers with DVD drives. I have adobe photoshop 2.0 starter kit. I have tried opening them with MS Photo editor also, still nothing. Anyone have any ideas? Do I need a higher adobe photoshop program?