Up for your consideration is a DIY replacement screen/LCD for your Roland MC-505. This is Not a direct replacement. You will need to make some modifications to your 505 for this LCD to fit. Be sure to watch these youtube videos for the installation process.

http://www.youtube.com/watch?feature=player_embedded&v=aKzjaLSuf1o

http://www.youtube.com/watch?v=sp4khcgHwKo&feature=player_embedded

 With 10 years selling these displays and hundred's of happy customer's, we strive to make the replacement as smooth and painless as possible. IF you have any further questions please contact us. 

Repairing and modifying electronic equipment can be dangerous for you and your equipment. Please do so at your own risk. Make sure you watch the videos to understand the scope of the repair before deciding if this LCD is for you.