07-23-2021, 08:51 PM
AllGold wrote:
Apple Diagnostics won't be able to see anything wrong if it's a power-related hardware problem. Either it has power or it doesn't. I don't think it will be able to diagnose an intermittent USB problem either unless it happens to be acting up during the test--and even then, maybe not.
Long ago, AHT used to be able to tell you if you had a malfunctioning port -- I know, because I'd gotten that as an error message on some older hardware ... I recall getting error messages about either USB or Firewire ports.