Maybe a bad DAC feeding the output stages or a bad mode-switch IC?
Scope for signal out from the DAC and signal out at mode-switch IC in PCM
DIG mode.

"Tim Schwartz" wrote in message
...
Hello all,

I've got an Onkyo TX-DS797 here with a complaint of 'no output'. Well,
it works ok with the internal tuner, or an analog input, but not the
digital inputs. If you connect a CD player to the coax input, the
display shows "PCM DIGITAL" which goes out if you pull the coax cable,
so the unit at least knows there is a signal there, but no audio.

Any suggestions?

Thanks!
Tim Schwartz
Bristol Electronics