Guitar and lead both work fine however my Marshall DSL40 (purchased Dec 2018) has stopped working, all lights work however there is no sound. High power output also makes strange popping/crackling noises when idle, also as of 2 weeks ago the amp would randomly but rarely make a clicking noise when in standby, this stopped a week later but  I had previously never ever heard this noise before. The standby also emits a quiet hum.

Hello,

I recently bought a Marshall Code 50 and I am very happy it. But there is one thing that is annoying. Sometimes the display doesn't show any text at all when I turn the amp on . Also when I turn the amp  on there is a loud pop noise but the noise only appears when the display shows text.

Any help would be appreciated. 

Thanks