Studer 961 hum

[GannonAlex]

Hello everyone...first post but longtime stalker here!
I recently purchased a Studer 961 console and am wondering if any 961/962 users here can comment on noticing a slight hum coming from the board or should it be dead silent sitting next to it in your room? Not sure if this is normal with this deck or if it is a sign of future power transformer issues? Thanks in advance!