Arrangers:

PSR530 - none

PSR740:- pitch wheel broke less than a year of use. Waited 11 weeks for repair.

PSR2000: Bad OS problems ( registration memories ) from day one - never resolved after 2 plus months.

PSR 1000: ( that temporarily replaced the 2000 ) : None

Casio MZ2000 : None ( A few samples were a bit muffled or had buzzing noise, not sure if that was a bug or bad sampling )

Korg PA80 w/ optiional VH board: None

Non Arrangers:

Motif: ( w/ optional AN 150 board ) : none

Korg M1 : had a very early release with the well documented Eprom / memory malfunction. very poor support from Korg on this.

Yamaha CP25 electric piano: None.. My closest friend's daughter still uses it, and it works like a charm.

Korg Poly Six: None ( til it died in a flood )

Roland Juno 60: none ( did not have it very long )

Hohner Clavinet: None

Silvertone Organ: None, but burned up after I installed a homemade distortion preamp.

AJ