Do you have a "low" MV setting on the meter?
Maybe around 200?
If so try that.
DeKay
How to bias a tube amp with a Multimeter
I’ve had this Shuguang s8mk integrated sitting in storage for 6 years. I bought a multimeter to bias it. The meter is set up to mV.
I’m getting zero read results. The amp has been warmed up for 90 minutes.
It’s got a funky bias panel.
What am I doing wrong?