In all my experiments with clock upgrades, and network tweaking, I have found the same thing as Wijnand, that the system can go ‘dead’ after a period of time, days, if not hours, depending on the configuration.
I always put this down to electrostatic build up. But maybe it was clock syncro issue? And when I think about it, there is like 5 clocks all within 2 feet of each other on the rack, and all these clocks are not mu-metal shielded like some high end components have, just exposed to one another.
Maybe this is an issue to be looked at?
Alpha Audio - Haarlem - Netherlands