Just wanted to share my bit.
The left channel output of my Grand was dead for I don't know how long but I always used the headphone output.
However I felt the need to fix the left channel, and I did yesterday (18/4/2026).
Using a headphone amp as an audio signal tracer I was able to locate the fault: A cracked SMD resistor R81 (4.7kOhm, probably size 0805)
I replaced it with a 1206 size (little bigger than 0805) 4.7kOhm thick film resistor because I did not have anything else around. Thin film type would be slightly better for noise reasons but the main thing is that my piano is fixed
If you look carefully at the photo you can see that there 's a chip off the resistor and there is a crack that starts at the middle zero of the 4700.
Hope I can help someone who has a similar issue.
Best regards,
Riekus
