Electronics Repair Questions? Ask an Electronics Technician
Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, does the Pioneer work in AM or FM mode?
What other devices are connected to the VSX-521-K? ...using what kind of connecting cables?
Please try; AM or FM setting is in itself a test.
What other devices are (to be) connected to the VSX-521-K?
...using what kind of connecting cables?