faydugas

:o the cd changer on my LS400 does not work. i hear sound of the cd engaging and can change from one cd to another; however, there's no sound. it shows Err21. tecnictions told me it's a problem with the lazer; but, i can find no one to work on the cd. the dealer will replace it with a new one for BIG bucks. i can't find out what Err 21 is. does anyone know? any info would be appreciated. thanks, fay :(