Roland D 70 problems

[Ovi]

I need help to repair my Roland D 70. There is no sound only the demo. I thinck that the oroginal sound bank is missing. How can I reload them ?

[Didier]

Watch this video:

Video 2 - How to restore the Roland D-70 using SYSEX - Factory Restore

[Ovi]

Thank you very much !