Roland piano factory reset - Casio Privia Px330 Px-330 88 Key Digital Piano New

Read this please

https://www.justanswer.com/electronics/9xlyw-roland-digital-piano-kr-4500-piano-turns.html

and these

https://www.google.com/search?q=Roland+kr+4500+no+sound

But you will probably need a service centre for replacing components.

Ch?o b?n, v?n ?? n?y c? kh? ??n gi?n, ??c bi?t ? Piano ?i?n hay c? tr?ng th?i n?y, b?n c? th? ghi l?i c?c ph?m b? m?t ?m thanh, sau ?? m? ?ai ?c ra, b?n d??i ??n c? n?t cao su b?n ch? c?n b?o v? c?i n?t ?? l? ???c.

https://guitardongtam.com/

Go to "YouTube" and type in "Roland FP8 piano repair"

I'm pretty sure it in the owners manual...

http://www.rolandus.com/search/site_search/?q=Roland%205500S%20piano%C2%A0

hope this helps?

No, it's not normal.To determine if it's a setting glitch or a hardware problem, perform a factory reset and see if the problem continues. If it does, it's a hardware problem and needs to go to the shop. Here's the reset instructions-
https://www.youtube.com/watch?v=8Xavte8p3Qc

The keypads can develop dirt , failure of pads which can result in such malfunctioning. If you are able to open the piano then carefully remove the keypads , clean the surface and reset.
this must solve the issue unless the pads/springs/mechanism are having fault.

The ROLAND pianos USUALLY require that you use a normally closed sustain pedal.

MANY pedals are the opposite and close when pressed. SOMETIMES you can open the pedal and reverse the way the switch works.

CLOSED is typical for Roland pianos when at rest. (open to sustain).

Note that the jack PROBABLY has a grounding contact so when no pedal is used/plugged in, the jack is shorted at the piano.