Hi all..so i pushed my Psr9000 to the limit last week. After about 3hrs of deep bass trance tunes banging away all of a sudden ZAP!..i really thought this thing had a heat overload thingy built into it,so thinking it just clicked out being to hot, i let it sit for 3hrs..still no output to my speakers. So i tore apart the amp inside and found two 5amp fuses burnt out,replaced them,put back together..still no output

BTW i do have headphone jack working ok,so it is the amp..any ideas what piece in there is failing?..so for the lenghtyness,just want to be thourough. THX