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padmaguruarts 0 Newbie Poster

Hi,

My computer was switching on itself so I open my computer to see if there was any wire problem. I even removed the usb prots and when I reconnected it I connected it from the wrongside and again I connected them as it has to be. Now my both frontal and back side usb ports are not working. They do not recognise my pen drives but when I connected my mobile to it then it recognizes it. I checked in the Device manager and they seem to be fine. Also I have checked in the BIOS there also it is enabled. Please help. Is it harware problem or any software problem.

JK

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Dani AI

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— because internal headers were moved and some USB devices still show up while others do not, follow this short, ordered triage to separate software from hardware and get usable ports back quickly.

  1. Test basics: try several different flash drives, a keyboard and a mouse on every port (front and back). Note whether a device appears in Disk Management (Computer > Manage > Disk Management) but has no drive letter.
  2. Device Manager clean-up: open a command prompt, run set devmgr_show_nonpresent_devices=1 then start devmgmt.msc. In Device Manager choose View > Show hidden devices, uninstall any greyed-out USB Mass Storage entries and then uninstall the USB Host Controllers (they will be reinstalled at reboot).
  3. Power settings and drivers: disable USB selective suspend in Power Options and uncheck “Allow the computer to turn off this device to save power” on each USB Root Hub. Download and install the motherboard/chipset USB drivers from the vendor (not just Windows Update).
  4. Cross-check with another OS: boot a Linux live USB. If flash drives work there, the problem is almost certainly Windows drivers or configuration. If they still fail, that points to hardware.

Do a careful hardware inspection: with the PC powered off recheck the front-panel header orientation against the motherboard manual, inspect for bent pins, scorch marks or a blown fuse near the USB area. A reversed header can short Vbus to data lines and damage only the mass-storage endpoints while leaving MTP (phone) enumeration working — phones often use MTP which uses different drivers than USB Mass Storage.

If the above steps fail, the likely outcomes are a damaged USB controller/channel or a bad header. Practical workarounds include a PCIe USB expansion card or a powered external hub (if any back ports still supply power). If there are visible burns or you’re uncomfortable probing the board, have a technician inspect it.

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