Is the problem with the sub or the AVR or both? (1 Viewer)

[flycaster]

I have the Yamaha rxv-800 (to download manual: http://download.yamaha.com/search/pr...uct_id=1064064) and am using a Paradigm PD-8. We recently had a thunder/lightening storm that fried the board within our security panel, and also may have done something to either the sub or the AVR. For the setup, I had the 2 mains, center and rear set at large, with 1D LFE/Bass Out set at SWF. After the storm, I noticed that whenever I changed TV stations, there was a bump-rumble sound from the sub, but not from any of the other speakers. First I disconnected the sub and changed the 1D LFE/Bass to Main, no more untoward sound when changing TV stations. So, I'm thinking (and hoping) that it was the sub that got blown and not the AVR. But now as I write this and think more about it, some circuit within the AVRN that controls the sub may have been effected and I don't know how to test for that. Nonetheless, as you guys know a hell of a lot more than I do, I'd appreciate your take on the situation. Thanks.

 

[schan1269]

Do you have another sub and AVR for troubleshooting?

 

[flycaster]

no

 

[flycaster]

solved problem. the a of the a-b speakers buttons somehow disconnected. so my mains were not working and when switching channels i got that bump from the sub. pushing in the button brought my mains back and stopped the bass bump. don't know why though.