That's Apple's fault. If they want to fix them, they need to be able to listen to them. So Apple should have tools so a human being can hear them. Relying on some computer to tell you everything is fine, when it's obviously not, is bullshit.

If they don't want to diagnose their hardware, then they should just exchange them with no questions asked. Getting denied on a repair "cuz the computer said so" is crap.