I’ve been having a frustrating problem with my Yamaha Clavinova CLP-735 digital piano. After playing for a short while, the sound suddenly disappears completely. The piano itself stays on and seems to work fine — the keys respond, the display is normal — but there is just no sound coming out.
If I turn off the piano and leave it off for some time, then turn it back on, the sound comes back and works normally. However, this fix is only temporary because after some playing time, the sound cuts out again.
From what I understand, the issue might be related to the main board, since the sound amplification stage is integrated there. So, if the main board is faulty, replacing it could solve the problem.
I’m wondering:
- What could be causing this intermittent sound failure?
- Is replacing the main board the only solution?
- How much could the repair cost?
If you’ve experienced something similar or know about this model, I’d appreciate any advice or suggestions. The piano doesn’t shut down or freeze, it’s just the sound that disappears — which makes it confusing and inconvenient.
Thanks in advance!