I tried to use my old DGX 640, but it had a first issue with no sound output at all. Referencing https://www.youtube.com/watch?v=PLPNpbFG5W4&ab_channel=TurnersWorkshop , I had the similar faulty capacitor C207. After replacing it, my piano how has normal volume audio output for all pre-sets, metronome, etc. However, any sound generated from the keys themselves are extremely soft. The volume of the keys when set to 100% output is as loud as the metronome at 10% volume. I'm not too sure what else I should try to check next to rectify the low volume from the keyboard itself.
I tried to use my old DGX 640, but it had a first issue with no sound output at all. Referencing https://www.youtube.com/watch?v=PLPNpbFG5W4&ab_channel=TurnersWorkshop , I had the similar faulty capacitor C207. After replacing it, my piano how has normal volume audio output for all pre-sets, metronome, etc. However, any sound generated from the keys themselves are extremely soft. The volume of the keys when set to 100% output is as loud as the metronome at 10% volume. I'm not too sure what else I should try to check next to rectify the low volume from the keyboard itself.