I’m home from holiday and can’t get any sound from the 552. The whole system was powered off and unplugged for 12 days. I’ve checked the source inputs and done a factory reset (power up holding the mute button) and are at the stage of being out of ideas. Can’t get sound from the LP12 or ND555 or the headphone amp, so assume the sources and NAP300 are okay.
Only change is the LP12 is now running a Lingo 4, powered from a different wall socket. No changes to any cabling and connections. I’ve checked other threads and tried the reset. Selected all inputs to no avail. It’s like it’s just stuck in mute - is that a thing?
I cant help with anything other than a reset and checking connections to the 300. I notice you have a Nova. Can that either accept an input from the 552, or give an output to the 300, to check each of them is working?
Unless you have a spare pre or a spare amp I cant think of any other way to check. Internal fuse might have blown on start up?
Could be the Mute relay is stuck, as it’s affecting both channels? – but I’d persevere and re-boot/power-down and back up in the correct sequence i.e. power-amp last on, first off.
Is there a hiss coming from the speakers or total silence? If total silence I suspect stuck mute relay. Happened in my SN3. I’ve been afraid using mute since but these days use mute every night thinking it’s good to exercise it.
I wonder if a relay that gets stuck always is out of repair. What if one press mute on/off for a couple of minutes in order to maybe get it to release I suppose naim would suggest that if that could help though.