Problem diagnosis

[StmLord]

Is it possible to have schematics for this?

The last 4 sidkicks I've build from different IC batches all have the same problem that I can't find a way to diagnose.
Sound does not play, eventhough the led on the Rpipico is flashing when a sound is supposed to play.
I thought it might be a defective DAC batch, but the last one I build it with a different batch of all ICs and different kind of pico (with USB-C and RGB light) and it has exactly the same problem.
If schematic is not possible, maybe you can help me of where to measure the output of the pico and all points to trace from pico to DAC?

[frntc]

When the LED is flashing (and the menu is coming up?) then the emulation part is working.

Are you routing the sound via the C64-mainboard? (then don't forget the solder jumpers)

Also the DAC doesn't output (much) when the capacitors' values are not correct. At pins 13-15 at the DAC you should see some traffic (data coming from the Pico), at pin 6 and 7 is the output.

[StmLord]

Yeah, menu is working perfectly, it was no problem of routing as I checked the jumper pads and checked the output via pin header too.
Anyway I've found the problem. Seller of the caps 2.2μF and 2.2nF had mixed labels on them, I've found out after a check on my inventory that caps physical sizes didn't match capacity, so I tried them otherwise and problem solved :)
Thanks for replying!