Sx-2300 troubleshooting help

[JTA77]

Hi everyone, first time caller, long time listener:

So I’m helping my dad out trying to fix his Pioneer SX-2300

Problems:
1. only left channel working for both a and b speaker sets.
2. All inputs seem to be active simultaneously. Digital screen shows that they are switching but nothing happens.

I’ve dusted and sprayed deoxit and searched for cold solder joints.

Suggestions please!

 

[tjg79]

Do you have the service manual and multimeter?

 

[JTA77]

Have a multi-meter but no service manual (could probably download one though).

 

[tjg79]

https://elektrotanya.com/

You can download the SX-2300 SM from the above website link.

 

[JTA77]

https://elektrotanya.com/

You can download the SX-2300 SM from the above website link.

Thank you!