Hi Erik,
some ideas off the top of my head:
For the Midi output:
- How is the status of the Midi A/B LEDs when you are playing the sequencer? Are they flashing?
- Have you looked at the mxer mutes to check that all is unmuted?
- Have you selected the correct output A/B?
- What are you using the Zaquencer with, a USB interface or hardware synths? Have you checked if that Midi receiver is working as it should (driver of interface etc)?
For the Midi input:
- How is the status of the Midi IN LED when you are receiving the clock?
- have you made sure that in Global menu encoder 2 is set to etl?
- have you checked the clock source?