I've got a Marantz amp

Question

I've got a Marantz amp model SR4300. I bought it from Richer Sounds about two years ago maybe more. It went into storage for a while un-used. When I tried to use it about a year back there was a pop from inside and it hasn't worked since in fact it has never worked to date. I've been meaning to see if I could get it fixed or asked for some assistance. I can't see anything wrong inside, no burn marks etc. Any ideas? Mark