How can I get Yamaha PSR 520 spare parts?

by Gerard Samuel Thota
(Secunderabad)

Hi,
I purchased the PSR 520 about 10 years ago. All this while I worked excellently well. But because of hectic schedule, I was unable to use it during the past one year. Now when I sharted using it once again, the LCD display slowly started malfunctioning and thereafter stopped functioning totally. There is now no display. Secondly, all the keys are not functioning properly well. I need to press the piano reeds with more force for them to sound. Where could I get the carbon strips so as to enable a technical person to replace the same so that the PSR 520 may be brought back to its old ways. I am from India and there are no authorised dealers in my vicinity. So please help.