Customer Ratings & Reviews

Hello GomezClan. Thank you for taking the time to write a review of the MK540 at Best Buy. I'm sorry to hear that you are having issues with the mouse not connecting and the keys sticking. Unfortunately lemons can happen sometimes with the thousands of products that get shipped out everyday. If you are still within the exchange period, please try a new one and see if that one works. If not, please contact our Customer Support and get a warranty replacement started. https://support.logi.com/hc/en-us/
-Charlton at Logitech

Hi Anon, thank you for your feedback! The MK540 uses a wireless USB receiver which will work for both the mouse and the keyboard. You may prefer the upgraded MK850, which includes Bluetooth, Multi-device, and FLOW with Logitech Options software: https://www.bestbuy.com/site/logitech-mk850-performance-wireless-keyboard-and-optical-mouse-black/5761911.p?skuId=5761911 - Will, Logitech.

Hi sbuyher93,
I am sorry you didn't like your new Logitech mouse and keyboard combo. This issue is not common, so I suggest you contact Geek Squad support for technical assistance or the Logitech support team. Logitech appreciates your product insight. https://support.logitech.com/hc/en-us/requests/new?ticket_form_id=360000621393&mID=13004
- Leo from Logitech

Hello, Very sorry to hear about the keys stopped working with the MK540. Also glad that you were able to get a warranty replacement through Best Buy. Just know that Logitech provides a 1 year limited hardware warranty for the MK540. If any issues should come up, please visit this link:  https://support.logi.com/hc/en-us/articles/360023459773-Getting-Started-MK540. This is the product support page for the MK540 which has troubleshooting FAQs, software downloads, warranty information, and more. Hope that you found this helpful and that all is going well. Thank you for choosing Logitech. - Richard from Logitech

Very sorry to hear about your troubles with the MK540 and the connection issues it's giving you. Try downloading Logitech's Option software which you can use to customize settings and also insure that your unifying receiver is working properly running the latest driver. Here's a link specifically for your MK540: https://support.logi.com/hc/en-us/articles/360024850313--Downloads-MK540-ADVANCED-Wireless-Keyboard-and-Mouse-Combo . Hope this was a help. Thanks for being a Logitech customer.

Hello customer, I'm sorry to hear that you're having some issues with your MK540. It sounds like you're having some connectivity issues. My recommendation would be to try different usb ports for the unifying receiver, specifically ports that are closest to the mouse and keyboard and that have minimal obstructions.

Hi Bruce,
Thank you for your feedback. Sorry you are having issues with your keyboard. Here are possible solutions:
If your keyboard is not working, the problem is likely to be a lost connection. The connection between the keyboard and the USB receiver can be lost for several reasons. Make sure you have fresh batteries in your keyboard. Make sure your keyboard is turned on. Make sure the USB receiver is securely plugged directly into a working USB port on your computer. Turn your computer on download the correct version of Logitech SetPoint Mouse and Keyboard Software.
If you need further assistance, please contact Logitech Support on the website.
LaShonda from Logitech

Hi Manny, Very sorry to hear about the connection issues that you're having with the MK540 Wireless Keyboard and Mouse. There are several reasons why connection can be lost: low batteries, moving the Unifying Receiver from one USB port to another, moving the receiver to another computer, plugging the receiver into a USB hub or other unsupported device such as a KVM switch (your USB receiver must be plugged directly to your computer), using your mouse/keyboard on metal surfaces, radio frequency (RF) interference of more powerful wireless devices (wireless speakers, computer power supplies, monitors, cell phones, garage door openers). Be sure to keep those devices at least 8 inches away from the receiver. If none of those solutions work, then there could be a hardware issue which should be covered by the 1 year limited hardware warranty. Here's a link to File A Claim:  https://support.logi.com/hc/en-us/articles/360024924974-Warranty-MK540-ADVANCED. Hope that you found this useful and that all is going well. - Richard from Logitech

Hi 12234, thank you for your feedback! You should not experience any lag with any Logitech product. For support, please refer to: https://support.logi.com/hc/en-us/articles/360023459773 - Will, Logitech.

Hi Brandon, thank you for sharing your experience with the MK540. I'm sorry that your experience with the mouse was inaccurate and had lag. In some instances the placement on the USB receiver can impact the performance of the mouse. If possible you can change the port that the USB is in or get a USB extender so that there is line of sight between the mouse and the USB. I'm sorry that the keyboard didn't live up to your standards either. I hope you are able to find a mouse and keyboard that better suits your needs. Thank you for being a Logitech customer. Kristi from Logitech

That sounds like an issue. In order to help you effectively, please provide your information to our support team by emailing socialcare@logitech.com. Name – Email address – Country – Product name – Brief description of the issue –

Hey there Gigi, I'm sorry to hear that you had some issues with your MK540. In the future, if you have this issue again, I would recommend trying a different USB port for the dongle, one closer to your devices and with as few obstacles as possible, and switch out the batteries for fresh ones. -Weston from Logitech