Thanks Corkyg,
I tried that already but the PC does not read the DVD.
The issue started when I was turning the computer off. It remained at the stage "shutting down" for 10 minutes.
There is power. The light of the DVD reader goes on. There is a hum from the fan, I believe.
i do not know about the hard drive.
I will power the computer with the case open and see if the fan turns and if i can feel or hear the hard drive.
Could it be a board failure? What else could it be?
Thanks for your great help as always.
Bernardg