Hello
Thank you for your tips. I’ve tried all “variants”. Unfortunately I can’t get the tone control on the TV-Box 5 remote control. Is it possible that the Yamaha vsx-500 AV receiver (in use for 11 years) is simply outdated? Whether it’s incompetence on my part or the AVR is simply getting old, I’ll look into purchasing a new one. For reasons of space, only an AVR Slim is possible.
Thanks again for the tips.