Can someone help me with this issue. I have a BHK Preamp bought Dec 2016- Its signed.
A Yesterday my tubes stopped working so I unplugged the power, turned off the preamp changed the tubes from the old 12AU7 ( RCA) to 12AU7 (Tungsol) - Clean swap.
Apparently the Preamp won’t power up anymore. Any ideas? What could have gone wrong?
There is a red led on the board inside, that does not lit up either. The fuse seems ok - but not sure of that.
Thanks for your help.