Amplifier dead

[rivendell]

hope someone can help, i have an icon stereo 25 integrated valve amp, playing tunes merrily this afternoon, couple of popping noises from the speakers when playing and then the amp went dead. I have done all the stupid stuff like switching it off checking and replacing internal fuses, nothing, changed fuse in power cable, still nothing, even removed the mains cable completely from my main conditioner and plugged it into another socket (all other components are working, but i did it anyway) amp is completely dead, no power light, nothing.

Anyone have any suggestions