New to the forum but thought I'd share something.
I've been running my 828 Original mk1 without many issues for about 12 years. It's been off to MOTU once with a Firewire issue, other than that been solid as anything and I love it.
Today it crashed with a high pitched whine. I immediately thought "hardware failure" as it is a very hot day in sunny Essex today
I took the unit out of the rack and flicked the power selector switch a few times, booted fine for 10 mins then the same thing happened.
Reading about how this is often a firewire issue, I tried a different cable & port on my Mac Pro, but same thing happened again.
I noticed someone online talking about the optical selector switch in the config app not always reading the correct setting, so I flicked that and the unit started passing audio again.
I have had issues with my driver (been using 1.6.58something for a while because it's been reliable even with Yosemite) but the optical settings often got lost under this OS. So I've updated to the latest drivers and been running the unit for an hour or 2 with no problems.
Is this something others have experienced?! Just thought I'd share my findings cos not much recent online about this unit. I guess I'm pretty old skool still running a Mk1 haha
