Hi I'm a newbie here I have just purchased a Marshall DSL40C 2015 Model Limited edition white made in Vietnam from ebay. It was sold as making a crackling noise when you move the vol knob. When I plugged it in to test it, it was making a loud humming/crackling sound so after some research I thought must be the EL34 Valves so did the old tap thing and nothing. The valves were both glowing so I thought I would check the bias on the old multi meter. So I connected the black to the middle on Con 5 and red to the left the the right side meter is set to 200mv but the reading on the meter stays at 0 and sometimes fluctuates to 1. It's a nice amp and I would love to keep it but I have until the 26th October to return it if I am not happy so I just want to explore every avenue before I decide on the former. My question is has anybody ever experienced this before where the bias reads zero?
Thanks for your help in advance.
Thanks for your help in advance.