I just bought this plextor and i think there's a problem. The green light seems to be always on when a disk is inside the burner. It diesn't matter if the disk is an audio, computer or blank. Is it supposed to be like this? Could it be because I connected the audio cable in the computer the wrong way (I had to reverse the left and right of my sterio)?

Yes it is normal, if the burner has a disc in it the light will be on.

just to add to Ankerson, this is normal. When a cd is being written the light will change to orange.

thanks! all is clear now :)