Contemporary receivers are no longer straightforward electronic sound reproproducers. They are complex computers, designed by companies whose lineage is not computer and user interface design.

That means this equipment (most brands) often has gremlins.

Be sure to throughly test all features as soon as it arrives since returning it under the seller 60 day policy will be much easier than getting it warranty-serviced.

If you're lucky, you'll end up with a "buyers remorse return" unit and not an example that had gremlins that might or might not have been addressed.