I have an Onkyo HT-R960 receiver that's been acting very flaky for the past couple of months. I've had to let it warm up for several minutes before being able to use it. I would also have to turn it off and on after it warmed up for it to serve the audio. If I didn't it would sound as click and pop (static) and then go into protective mode (auto-shut off) if turning the volume up too high. Once it warmed up and I turned it off and then back on it would be fine. At the moment it's still clicking and popping, but no amount of warming it up seems to get it to work. I can, however, force it to go into stereo and it plays audio fine on two-channels only. Nonetheless, I've opened it up and it appears the main two capacitors have this tacky black goo on them. The dimple on the top of the capacitors isn't expanded as one can see though. At first I thought this was some sort of insulating material for these capacitors and it was intended. Now I'm not so sure and I've gleaned from several places that it could be leaking from the one or more of the capacitors. Upon further inspection, it does appear to possibly be originating from the capacitors. I won't be able to truly tell unless I remove them. I guess that's next?
My questions are the following:
- Where to get replacements for these if they should get replaced? From what I can tell this would be an exact replacement: https://www.ebay.com/i/183199809718
However, I've seen much cheaper, but higher voltage versions of these and wonder if those would be Ok: https://www.ebay.com/i/182068444181
- Should my next step be to remove these and determine if the goo is truly leaking from them? I've replaced capacitors before on other electronics, but I've never heard of a failure with them other than the proverbial dimple expanding to show a failure.
I'm including and image of my capacitors on the main board and a link to the service manual that has schematics for this board. For reference the capacitors are C6901 and C6902 when looking at the manual.
My thanks in advance for any advice.