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Lenovo 100e Chromebook 2nd Genは、軽くて使いやすいノートパソコンです。 2019年11月発売、型番81QB000AUS

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My usb port isn't recognizing anything

My USB port suddenly stopped recognizing anything and I'm not sure what to do.

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Hi @valpop

If you've verified that your USB devices are working when connected to USB ports on other devices then try resetting the Chromebook hardware and check if that resolves the problem.

Turn of the laptop if it is on and then wait 30 seconds.

Then press and hold the Refresh and Power keys (both together) and release the Refresh key when the laptop starts up.

Boot up the laptop and check if the USB port now works.

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This didn't help me, unfortunately.

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If there is no indication by the laptop software that a device is being tested (aka you plug it in and NOTHING happens, no popups or wait messages) test the power on the port, either with a device that has a light that comes on when connected to usb power or a USB power tester. I bought one for a problem just like this (they are cheap on Amazon) Use it to check if power is even making it to the port. If you decide to go with a USB power tester, get the one that also checks data positive and data negative. This will help narrow down which path is bad.

If you getting any issues on this check, visually check the port itself for cracking, bent center board, or dirt/scratches on the connections. I have had USB ports with the copper worn off the center board, or the center board had cracked and the leads had broken.

If everything looks good, check to see if the port moves at all after you put in a device. Sometimes if there is enough room it can wiggle loose from the mainboard and no longer make a good connection. If you suspect that you will have to remove the mainboard and check the mainboard for damage at the USB port connections.

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Valerie さん、ありがとうございました!
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