Many thanks, Lisa - just what the doctor ordered.
Thanks, too, Accessless. I need a replacement because sometimes I can watch normally bought DVDs and other times I can't. Also, when I am burning home videos to DVD, the drive struggles - I can hear the disc whirring around in the drive and the light flashes on and off whereas it should remain stable while burning. It wasn't always like this, but I can tell it is flagging. It's about 3-4 years old and in constant use.
Thanks again.