The USB ports stopped working
Mac mini Late 2012 - 2.3 ghz Core i7 , - The USB ports (all4) stopped working - after I plugged all the usb devices: scanner printers hard disks -around 10-11 devices- and they were all turned on and connected to the computer via self powered usb hub, and when I started the computer I had a (USB device drawing too much power) error message , and all the usb went down , I researched and did all the suggested solutions I tried resetting NVRAM/ PRAM , and SMC. with no result, I ran the Apple Hardware (Extending) Test and the result was surprisingly “No trouble found” pass number 1 .. I re-ran the test again pass number 2 got the same result “No trouble found” yet still the usb problem exist. could it be a hardware malfunction, if so is it possible to replace the USB ports or hub or its controller only from the logic board instead of replacing the whole board?, n.b.: everything else is working fine (firewire, thunderbolt, ethernet, bluetooth, wi-fi, earphone … etc)
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2 Yorum
With a powered USB hub are your devices accessible that way? Basically, did the power service within your Mac Mini fail or is the USB hub chip?
Dan tarafından
hi Dan, thank you for your reply,
No, With a powered USB hub the devices are not accessible, and for the general power service within my Mac Mini, it is working fine, it is only the 4 usb ports that are completely dead. (when I mentioned the external hub was because I think that caused the problem .. when I started the computer while around 11 devices was connected to it and they were all on)
samisrafi2000 tarafından