I am having a similar problem, I have a combined cd-r/dvd drive that came with my system. I have had no problems reading cds or dvds, but recently I tried to burn a cd and got the no disk error message.
I have tried different cd medias and manufacturers but to no avail.
I have checked all the obvious suspects: have admin priviledges, have imapi running, have enabled/disabled cd burning on drive properties
being a new system, it should not be a power issue as I have not added anything else.