Sony STR-DA30ES Receiver "implicated" Questions

...this problem. Any suggestions? Help! What part of FAN ERROR implies an external reason? The FAN is implicated. A web search for "STR-DA30ES fan error" leads to lots of owner input. For example:

what is night and pure button? 'Night' compresses the audio's dynamic range to make soft sounds more audible and loud sounds less loud for a given volume setting. The assumption being that there are ...

...it comes back. Disconnect it. Test each cable the same way. At some point a single cable might be implicated. Replace it. Also consider routing of any analog audio cable near power cables, the TV

...suggestions? How connected? Audio, video or all? Isolate each cable at the TV end to see if one is implicated. Then reconenct the cable and isolate the receiver end of the same cable(s). If it's the ...