Rotel DAC

You also need to list the complete system.
Zd542

How the heck would listing the complete system help in this situation? He asked sarcastically.

Here's my suggestion if the dac truly is at fault: used on ebay.
No idea who the seller is but probably cheaper than repair.

Much thansk! for the replies so far.
Yes, all of the coaxial outputs appear to be in working order.
Yes, we will try different cables. Just wondering if there is a repair tech or shop if we need a consultation?

Keep me posted & Happy Listening!

Could easily be the cable. Has your friend tried different ones?

How does he know toslink is the problem? It could be something else. I would have him try all the toslink connections on the Rotel first, if he hasn't already done so. You also need to list the complete system.