Just going through some steps that I've also followed for my own issue, any difference between digital/analog sources? Do the relays click on/off like they should (eg by pressing mute)? Does passing the analog input signal through the DSP produce audio?

I have a pair of Pioneer RM-07 monitors that I bought a while ago. When I was testing them I noticed that one speaker would cut out and I thought it was just a bad cable connection. At the price they were being sold for I was willing to take a risk on them. However, 6 months later and the one monitor still has the same issue. Most of the time it works, but there are times that the power LED is on but I get absolutely no sound. I can hear the relay clicking on/off sometimes and then it will/won't work depending on what it feels like. I've tried XLR and RCA inputs with the same issue. There's no...

Have you checked the settings to see if the zones are configured properly? Have you performed a factory reset yet?

Anyone? I've posted this issue on several forums without any reply. Used to be forums would be a nice place for technical questions and learning but it's so disheartening to see it and all its knowledge go away. Sorry for the rant, just feels a bit hopeless, especially when chatgpt can't be of any help either here.

So I've done a little more testing and found something out. If my DJ mixer is on the crackling/popping happens on every line input it's connected to. With the mixer off I can change volume and mute without issues. When I have the cables plugged into the mixer and I touch both the metal on the cable and the chassis of the Marantz I get a tingling sensation/electric shock, it's more intense than any earth tingle I've had so far and can hurt. I'm wondering if there's a grounding issue somewhere? I've tried different RCA cables and the issue persists. Both the Marantz and my DJ mixer are not grounded...

I've been doing some more digging and I believe the issue should be around the R2A15218FP chip. I came across another thread where the OP mentions clicks and mute not working properly and points to some pins on the chip not being soldered properly. [URL="https://repairalmostanything.com/thread/978/onkyo-tx-nr535-sound"]You can find the thread here[/URL]. I'll probably take the receiver apart these days and will check that chip for any desoldered pins.
​I've been doing some more digging and I believe the issue should be around the R2A15218FP chip. I came across another thread where...

Hi,

Just joined because it seems like forums with knowledge are a bit of a dying breed these days and repairs don't seem to be a thing. I work at a boutique effect pedal company and have some knowledge that I gathered myself on how to fix electronics, but no university education on anything so might take some more time to understand concepts. Mostly dealing with audio equipment and this seems like a nice place to gather more knowledge

Hi,

I bought a used Marantz SR5007 and it's giving me some issues that I can't seem to really place. It functions well in most settings, ARC mostly works, it has no issues driving my speakers in any of the digital input modes, but I'm having issues running analog inputs in direct or pure direct mode. For some reason in this mode there's distortion for every volume increment I give it, but once the volume is stable it has no issues. Muting creates a loud pop, switching to another source also causes a pop and so does turning off the amp in that mode. Again, no issue in the digital modes....