Yamaha psr ew400 piano loses sound

[laidman]

Yamaha PSR EW400 piano intermittently loses sound and shuts down.

Youtube people recommend verifying that the DC jack's solder connections aren't broken, and the replacement of a couple of capacitors in the vicinity of the DC jack. While these solutions might work, I'd feel a lot more secure if I had a schematic to help me check the status of the myriad components.

Schematic and suggestions are welcome.

[lotas]

Re: Yamaha psr ew400 piano loses sound

[stj]

Re: Yamaha psr ew400 piano loses sound

i wouldnt be surprised if a rom is failing - these yamaha keyboards are all dying now.
if you have the tools - read the rom out - for backup purposes