crwdns2934241:0crwdne2934241:0 lulujaimearredondo

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Why USB ports are not working

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the USB is not working I tried all the Dell diagnostic and it is failed.

I tried to rest and still not working.

BIOS is good.

I need to get it repaired but dont know which chip is responsible as both usb ports are not working

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Dell Inspiron 15-3521

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open