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Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB GDDR5 Video RAM

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USB port does not read/power USB sticks, but external HD are ok.

Hi all, first, THANKS for what you guys do here!!!

I'm not even sure how to ask this. I have multiple usb sticks and external USB HD (think of Seagate FreeAgent GoFlex), they all work in my other MacBook Pro (High Sierra, if it matters) or any other Windows machine. (the MacBook Pro at least recognize and acknowledge them)

The problem I'm having is with this other MacBook Pro 15" (non-retina, mid 2012 also on High Sierra).

I plug in the External HD and it would work fine. but when I plug in the USB sticks it does nothing. Does not light up to signal power, does not show up in disk utility, nothing.

I would assume if the USB ports had power issues, the external HD would not be read neither, but thats not the case. USB Sticks - Nothing. External HD ok.

I did the SMC and RAM reset multiple times already.

Thank you in advance!

Answer this question I have this problem too

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Can any one direct me to how to find my Logic board model/number so I can start looking for a replacement? - thank you guys.

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Sounds like the USB ports power feeds are not working. You'll need this tool to check things: USB Mini Voltmeter. If thats the case your logic board needs fixing which is beyond most DIY'er's. Your other option is replace the logic board.

USB Mini Voltmeter Image

Product

USB Mini Voltmeter

$9.99

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Thanks! I read a semi-similar USB Power issue: one port (semi) works, other is dead from another user and was wondering the same.

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John Smith will be eternally grateful.
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