Logitech Keyboard Hong Kong

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Laila Berri

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Aug 3, 2024, 5:04:48 PM8/3/24

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I have a Logitech m525 mouse that I use at work (Win 7 32-bit). For the first little while, I would take the mouse home with me which meant unplugging the Unifying receiver. After a few times doing this however, I noticed that if I plugged the Unifying receiver back into a previously installed port, it wouldn't work. Over time, I've actually run out of ports to plug this device into. I get the following "USB Device Not Recognized" error:

This is typical behavior of a broken/worn down unifying receiver. The only way to fix this is to purchase another. However, you'll have to setup your old devices to the new receiver using Logitech's software.

This may have to be done with each new computer you use the mouse/new unifying receiver with. Although after a fresh install of Windows 8, my receiver picked up the mouse just fine without any of the Logitech software.

If the Receiver isn't being recognized it is not necessarily broken. I plugged my t600 receiver into my pc (win 7 64bit) and i am having these same problems. I move over to my laptop (windows 8) with the same receiver and i can use the mouse with no difficulty. There is something about windows 7 64 bit that is having issues with this. Test your receiver on a different device before claiming its broken. or returning your product. Chances are you may be able to make this work.

This seems to have affected not just logitech unifying receivers, but all USB Composite Devices.My Android tablet is also affected, as well as my Microsoft Xbox 360 USB Controller receiver, since it has two 360 pads sync'd to it, but my wired PowerA Minix360 is not affected. My microsoft wired keyboard 600 and logitech V220 are also not affected, as they are not 'USB Composite Device', but 'USB Human Interface Device'.

USB Composite Device is used to wrap up multiple child Devices in a single parent Device, such as two USB Human Interface Device endpoints (One for keyboard, one for mouse) like the Logitech Unifying Receiver does.

My Logitech USB receiver had similar problems to those above. Drivers were not available or couldn't be found. I tried everything. Turned out it was a problem with the last Windows Update 2/13/2018. The link below shows you how to go into the Device Manager and command prompt to uninstall the last update. Not sure if it only uninstalled it or if it uninstalled and then re-installed with a fix, but my mouse and keyboard are working again. See link and explanation below.

After installing this update, some USB devices and onboard devices, such as a built-in laptop camera, keyboard or mouse, may stop working. This may occur when the windows update servicing stack incorrectly skips installing the newer version of some critical drivers in the cumulative update and uninstalls the currently active drivers during maintenance.Microsoft is working on a resolution and will provide an update in an upcoming release.Workaround steps are available in KB4091240.

This issue occurs when the Windows Update servicing stack incorrectly skips installing the newer version of some critical drivers in the cumulative update and uninstalls the currently active drivers during maintenance. Resolution

I opened my 2 Logitech receivers (as suggested in the youtube video) and the four copper pads appeared highly corroded with a great deal of black oxidation on the leads. I could not get them to work by stuffing a piece of paper between the circuit board and USB housing, as suggested in the video, but I was able to hold the USB receiver inside the laptop USB port with my hand and it was recognized. However a few moments later and I probably quivered and lost electrical contact, and it said, "USB port not recognized" after having formerly recognized it.

You probably need a new receiver, or you can follow the youtube video, take apart the nub, and try to put it together so it will work. I must say, you may not have good luck, the manufacturing quality of this USB transceiver is horrible, Logitech, shame on you!

In my case, the copper line (path, whatever) was broken. You need to connect it by soldering. It will work. I attached a photo with a possible broken line (see photo). It was #3 in my case. First, open it with pliers than pull out the logic board and fixsee the logic board and possible broken line place.Hope it helps!

I had a similar issue. In my case I found the USB receiver actually pushed slightly too far in to the port. It somehow detected as an HID Mouse but did not install properly. If I pulled it back out just a millimeter it would kick in and work just fine.