Had trouble with my 540 as well , after 3 months use, even after repair it is slow to open/play. I got a felling its a matter "you get what you pay", yes its a throw away unit.
NAD 512 CDP - Drawer won 't open
My father's been having trouble with his CD player. It began months ago with, after loading a CD, the unit not registering that there was a disc in it until he would tap the drawer moderately in just the right spot. Now it won't open at all! Is it worth getting repaired? Should this happen after only 5 years? My old NAD lasted much longer. Advice would be greatly appreciated. Thanks.