Switched tubes around and having the same issue.
To czarivey's point, appears like it was a bad tube impacting (what appears) to be a resistor and rectifier.
I plan to order the two parts and will decide if I want to repair it or sell it to someone interested in modifying the unit. Seems like they sell for ~ $1250 used... not sure what a repair discount would be ($850?).
FWIW: I really like the EAR834; extremely quite, very good spatial resolution and detail. I have had the unit for ~ 10 years and never felt the need to upgrade.
However, I would not mind a McIntosh preamp... so I guess I am at a crossroad?