I. Hola Ricardo, aunque no soy experto, como lector habitual deseaba trasladarle un poco de información sobre este tema, recogida en parte de consultas anteriores, por si le fuese de utilidad mientras le atiende de primera mano un experto o profesional. Le ruego me disculpe tanta imprecisión y las molestias de lectura, mucho ánimo.
https://geekhack-org.translate.goog/index.php?topic=89807.0&_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://www-badcaps-net.translate.goog/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-audio-equipment/106696-onkyo-tx-nr828-popping-sound-every-5-min?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc#post1826252
https://repairalmostanything-com.translate.goog/thread/864/onkyo-tx-rz800-popping-noise?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://audiokarma-org.translate.goog/forums/index.php?threads/onkyo-a-sv210-crackling-noise-troubleshooting.626884/&_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://www-avsforum-com.translate.goog/threads/onkyo-tx-sr805-static-noise-popping-front-left-channel.3276071/?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://audiokarma.org/forums/index.php?threads/receiver-makes-crackling-popping-sounds-from-speakers-when-powered-on.652221/
https://www-axiomaudio-com.translate.goog/boards/ubbthreads.php/topics/445353/onkyo-receiver-making-a-click-noise-randomly?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://www.quora.com/My-Onkyo-sound-system-keeps-popping-with-no-sound-and-if-there-is-music-going-through-it-it-s-not-distorted-What-could-be-the-cause-and-how-can-I-fix-it
https://www.forodvd.com/tema/184166-ruido-canal-de-mi-onkyo-ht-r558/
https://www-stereonet-com.translate.goog/forums/topic/224151-onkyo-receiver-loud-noise-then-standby-mode-audio-spike/?_x_tr_sl=en&_x_tr_tl=es&_x_tr_hl=es&_x_tr_pto=sc
https://www.reddit.com/r/Onkyo/comments/kouhom/sound_popping_issue/
https://www.nosolohd.com/xf/threads/mi-onkyo-se-pone-tontorr%C3%B3n.23625/