My usb port is not working.

when i turn on my laptop, its usb port is not working. but after some time of turning on it work for while or for a long time. it automatically connected and disconnected regularly. most of the time it doesnt work. help me please...

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Use a magnifying glass and a strong light to visually inspect the USB port.

Ensure that the pins are all there and that they are straight and parallel with each other.

Also check that there is no dust or lint blocking the port enclosure. If there is, use a vacuum cleaner to try and get it out. Do not use a metal probe to try and dislodge it as you may damage the pins and cause damage to the USB controller or USB power supply. If you have to use a tool to dislodge the obstruction, gently use a wooden toothpick.

If it appears OK try connecting a USB cable (one end only need be inserted) and very gently try moving the USB plug from side to side or up and down to feel if the port appears to move or is loose at all. If it does it may be loose on the motherboard and will need resoldering. As it is most likely a SMD (Surface Mounted Device) type connector, you will need SMD soldering skills and tools to effect a repair. This is not a job for novices as you can cause more problems that what you had if you don't know what you are doing. I suggest that you contact a reputable, professional laptop repair service and ask for a quote. Alternatively as the USB ports (on the right side anyway, if on the left side you're out of luck) are mounted on a board connected by a cable to the motherboard, you may wish to try and find a replacement USB port board for your model laptop and simply replace it with a new part. Here is a link to a video which shows how to open your laptop. At 2:28 minutes into the video the 2 USB ports are visible.

If the USB port feels secure try connecting an optical mouse or a mobile phone, to the USB port just to see if the power being supplied by the port remains permanently on with the device connected, i.e. the mouse light stays on or the mobile phone charge light stays on. If it goes off go to Device Manager > Universal Serial Bus Controllers and find the USB Root Hub entries, right click on each entry and select Properties then Power Management and uncheck the box that says 'Allow the computer to turn off this device to save power' then click OK. See if this resolves the problem

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when i connected usb mouse it does same thing usb power is turning on and turning off automatically. and wwhen it on it works but after turned off it wont.



I assume all the other things I suggested checked out OK as well?

Did you check the Device Manager settings?


yup thats all fine....

i think from the part of software there is not any problem...there must be a problem of hardware...please tell me how to check the usb power and and connection of mainboard for usb port


ohh! sorry there was also another thing that i forget to tell you... another problem...the problem is that my touchpad was not working and i google the problem and solve it by changing its touchpad type to basic from advance in the bios and installing the new touchpad driver...but this usb port problem is my current headache and i am not get the solution yet



If it is one of the 2 USB ports on the right of the laptop, as I said the video shows how to access them.

If it is the USB 3.0 port on the left you can access it to check if it is loose but it is harder to replace than the other two as it is soldered onto the motherboard.

I don't have a schematic diagram for the laptop so I cannot tell more than check the connection for the flex cable for the right side USB ports and see if the faulty port (assume that it is only one) is firmly attached to the respective board.

Did the USB problem start after you 'fixed' the touchpad problem or was it there as well. if after try reverting the touchpad back and see if that restores the USB to normal function. If it does then there is a problem perhaps with the touchpad settings affecting the USB (is it only 1 port or all ports?)


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