"Beirut is a big city..."
This is really helpful to someone who lives there, but that aside, the chassis in those amps are quite packed and you still need to disassemble a good bit to even do a proper visual inspection. Even then, you'll need some test equipment to determine the root cause of the issue. Not a DIY job, in my opinion. Those amps are definitely deserve a proper diagnostics and repair. Contact ML and see if they recommend a service center in your general vicinity.
This is really helpful to someone who lives there, but that aside, the chassis in those amps are quite packed and you still need to disassemble a good bit to even do a proper visual inspection. Even then, you'll need some test equipment to determine the root cause of the issue. Not a DIY job, in my opinion. Those amps are definitely deserve a proper diagnostics and repair. Contact ML and see if they recommend a service center in your general vicinity.