Customer Ratings & Reviews

The Lenovo C940-15 ships with Intelligent Cooling software that allows the cooling fan to adjust to the workload the system is currently supporting. The cooling system within the Yoga C940-15 is customized to maintain the proper operating temperature of the Yoga C940-15. If you feel your Yoga C940-15 is running too hot, we recommend you have your local Best Buy Geek Squad check the device to assure proper operation. You can call Lenovo Tech Support if you have additional questions at: 877-453-6686.

Hello. Thanks for choosing the Lenovo Yoga C940 Laptop. We are pleased to hear the features, performance, and design of the Yoga C940 are meeting your computing needs so well

Hello. Thanks for choosing the Lenovo Yoga C940 Laptop. We are pleased to hear the features, performance, and design of the Yoga C940 are meeting your computing needs so well! In regards to the display please make sure you have the latest device drivers installed. You can easily accomplish this by scanning the computer with the Lenovo Utility software available on this computer. This system has Lenovo utilities installed to help maintain the health of the device and keep the operating system software up to date. Type "Lenovo Vantage" in the Cortana Search window (if Lenovo Vantage is not installed on your device, you can download the APP and install it now). Select Lenovo Vantage from the list. In the window that opens, click on "Health and Support". In the expanded menu, select "Hardware Scan” In the window that opens, select "Run Quick Tests". This will scan your entire system for errors. Follow any directions that may pop up. If the problem continues after this scan, now click on "System Update". First select Windows update from the menu. Scan your system to be sure you have the latest version of Windows 10. Once that scan is complete, select "Additional Updates". This will scan your device to be sure there are no new BIOS/Driver updates needed. Follow any instructions that may pop up. If the issue continues after these updates, we recommend you call Lenovo Tech Support at: 877-453-6686 for additional help.

Thank you for choosing the lenovo Yoga C940-15 for your son. We are pleased to hear that the features and performance of the Yoga C940-15 meets the computing needs of your son so well. Every component of Yoga C940 was engineered with your experience in mind. That’s why the Yoga C940 offers the brilliant color and clarity with ultra-narrow bezels, with 500 nits brightness, it’s 50-percent brighter than standard SDR displays. You’ll enjoy amazing realism that's vivid, nuanced, and powerful. Capture your ideas the moment inspiration hits with a garaged digital pen. Featuring an in-body charging compartment, the Yoga C940 ensures you’ll never lose a thought—or your digital pen—again. The convertible hinge hides a powerful Dolby Atmos Speaker System that immerses you in 3D sound in every mode. Combined with two sets of speakers featuring powerful subwoofers, custom tweeters, and unique vibration buffers that reduce unwanted noise, your audio will sound bigger, deeper, and more accurate. Experience how the Yoga C940 embodies world-class craftsmanship, innovative solutions, and elevated design. Log into your Yoga C940 in less than two seconds with an integrated fingerprint reader. That’s three times faster than the average time it takes to type a password. Forget your password.

Thank you for choosing the Lenovo Yoga C940-15. We are pleased to hear that the performance of the Yoga C940-15 meets your computing needs so well. Every component of Yoga C940 was engineered with your experience in mind. That’s why the Yoga C940 offers the brilliant color and clarity with ultra-narrow bezels, with 500 nits brightness, it’s 50-percent brighter than standard SDR displays. You’ll enjoy amazing realism that's vivid, nuanced, and powerful. Capture your ideas the moment inspiration hits with a garaged digital pen. Featuring an in-body charging compartment, the Yoga C940 ensures you’ll never lose a thought—or your digital pen—again. The convertible hinge hides a powerful Dolby Atmos Speaker System that immerses you in 3D sound in every mode. Combined with two sets of speakers featuring powerful subwoofers, custom tweeters, and unique vibration buffers that reduce unwanted noise, your audio will sound bigger, deeper, and more accurate. Experience how the Yoga C940 embodies world-class craftsmanship, innovative solutions, and elevated design. Log into your Yoga C940 in less than two seconds with an integrated fingerprint reader. That’s three times faster than the average time it takes to type a password. Forget your password.

We hope the issue you were having with your Lenovo Yoga C940-15 has been successfully resolved by now. If not, be sure any software you installed is compatible with Windows 10. There is no need to install Microsoft Office software. The software is already part of the operating system, you just need to activate the software with a purchased product key. If you have installed a copy of Microsoft Office, this is conflicting with the existing copy on the system and this will slow your system down. If you have installed a 3rd party anti-virus program, be sure that Windows Defender is turned off and that the trial version of McAfee Anti-Virus software is uninstalled. There can only be one anti-virus program on the system. You may need to restore your system to original factory default settings if any of the programming errors have occurred. You can do that by typing "restore" in the Cortana search window. Just click on the magnifying glass icon at the bottom left of your Windows 10 Desktop. Click on "Reset This PC" Then click on "Get Started" and follow the on screen directions to restore to factory defaults. You can also use Lenovo Q-Control to manually control fan and system performance: ( Fn + Q ) option to change the fan by undervolting the processor. If the issue continues, we recommend you call Lenovo Tech Support at: 877-453-6686.

We are sorry to hear that you are having issues with your Lenovo Yoga C940-15, model number 81TE0000US. It is possible that resetting the computer back to original factory settings may fix the issue. Since you can not boot the computer, this system is equipped with OneKey Recovery System. There is a very small pin hole on the bottom right side of the device, right near the top right side of the cooling vent on the bottom of the device. You will need a pin to push this reset button. Plug the device in. Let the battery charge for about 15 minutes. Push the reset button. The system should boot to a choice screen where you can choose "Restore To Factory Default". Select this. It will delete everything from the hard drive except the original factory install of the operating system. You will need to reinstall all programs and files after the reset. If you don't have copies of the files, try to make one before you restore by selecting "Boot to desktop" and trying to back up your files. Once you have the computer reset, be sure any software you installed is compatible with Windows 10. There is no need to install Microsoft Office software. The software is already part of the operating system, you just need to activate the software with a purchased product key. If you have installed a copy of Microsoft Office, this is conflicting with the existing copy on the system and this will slow your system down. If you have installed a 3rd party anti-virus program, be sure that Windows Defender is turned off and that the trial version of McAfee Anti-Virus software is uninstalled. There can only be one anti-virus program on the system. You may need to restore your system to original factory default settings if any of the programming errors have occurred. You can do that by typing "restore" in the Cortana search window. Just click on the magnifying glass icon at the bottom left of your Windows 10 Desktop. Click on "Reset This PC" Then click on "Get Started" and follow the on screen directions to restore to factory defaults. Regarding the external power supply on the Yoga C940-15 model, this configuration uses a 135W external power supply. The maximum wattage a Thunderbolt 3 port can support is 100W, so the Yoga C940-15 uses a dedicated power port. If the problem persists, we recommend you contact Lenovo Tech Support at: 877-453-6686.

Once again, thank you for choosing the Lenovo Yoga C940-15. You can keep your computer running at its best by keeping the Windows 10 Operating System and all supporting BIOS files and drivers up to date. You can easily accomplish this by scanning the computer with the Lenovo Utility software available on this computer. Just type "Lenovo Vantage" in the Cortana Search window (if Lenovo Vantage is not installed on your device, you can download the APP and install it now). Select Lenovo Vantage from the list. In the window that opens, click on "Health and Support". In the expanded menu, select "Hardware Scan" In the window that opens, select "Run Quick Tests". This will scan your entire system for errors. Follow any directions that may pop up. If the problem continues after this scan, now click on "System Update". First select Windows update from the menu. Scan your system to be sure you have the latest version of Windows 10. Once that scan is complete, select "Additional Updates". This will scan your device to be sure there are no new BIOS/Driver updates needed. Follow any instructions that may pop up. If you ever need additional help with your Lenovo computer, we recommend you call Lenovo Tech Support at: 877-453-6686 for additional help.

The Lenovo Yoga C940-15 ships with one standard USB port and two Thunderbolt ports. Every component of Yoga C940 was engineered with your experience in mind. That’s why the Yoga C940 offers the brilliant color and clarity with ultra-narrow bezels, with 500 nits brightness, it’s 50-percent brighter than standard SDR displays. You’ll enjoy amazing realism that's vivid, nuanced, and powerful. Capture your ideas the moment inspiration hits with a garaged digital pen. Featuring an in-body charging compartment, the Yoga C940 ensures you’ll never lose a thought—or your digital pen—again. The convertible hinge hides a powerful Dolby Atmos Speaker System that immerses you in 3D sound in every mode. Combined with two sets of speakers featuring powerful subwoofers, custom tweeters, and unique vibration buffers that reduce unwanted noise, your audio will sound bigger, deeper, and more accurate. Experience how the Yoga C940 embodies world-class craftsmanship, innovative solutions, and elevated design. Log into your Yoga C940 in less than two seconds with an integrated fingerprint reader. That’s three times faster than the average time it takes to type a password. Forget your password.

The performance configuration of the Lenovo Yoga C940-15 model number 81TE0000US, requires an external 135W power supply/AC charger. The maximum watts that USB-c/Thunderbolt 3.0 can support is 100W.

We are sorry to hear that you had issue with audio while using the Lenovo Yoga C940-15. First, be sure any APPs installed are compatible with Windows 10 Operating System. Then, be sure you have the latest version of Windows 10 on the computer, then update all of the BIOS files and drivers up to that latest version of Windows 10. You can easily accomplish this by using the Lenovo Utility software. This system has Lenovo utilities installed to help maintain the health of the device and keep the operating system software up to date. Type "Lenovo Vantage" in the Cortana Search window (if Lenovo Vantage is not installed on your device, you can download the APP and install it now). Select Lenovo Vantage from the list. In the window that opens, click on "Health and Support". In the expanded menu, select "Hardware Scan" In the window that opens, select "Run Quick Tests". This will scan your entire system for errors. Follow any directions that may pop up. If the problem continues after this scan, now click on "System Update". First select Windows update from the menu. Scan your system to be sure you have the latest version of Windows 10. Once that scan is complete, select "Additional Updates". This will scan your device to be sure there are no new BIOS/Driver updates needed. Follow any instructions that may pop up. If the issue still continues after these updates, we recommend you call Lenovo Tech Support at: 877-453-6686 for additional help.

Thank you for choosing the lenovo Yoga C940-15. We are pleased to hear that the features and performance of the Yoga C940-15 meets your computing needs so well. Every component of Yoga C940 was engineered with your experience in mind. That’s why the Yoga C940 offers the brilliant color and clarity with ultra-narrow bezels, with 500 nits brightness, it’s 50-percent brighter than standard SDR displays. You’ll enjoy amazing realism that's vivid, nuanced, and powerful. Capture your ideas the moment inspiration hits with a garaged digital pen. Featuring an in-body charging compartment, the Yoga C940 ensures you’ll never lose a thought—or your digital pen—again. The convertible hinge hides a powerful Dolby Atmos Speaker System that immerses you in 3D sound in every mode. Combined with two sets of speakers featuring powerful subwoofers, custom tweeters, and unique vibration buffers that reduce unwanted noise, your audio will sound bigger, deeper, and more accurate. Experience how the Yoga C940 embodies world-class craftsmanship, innovative solutions, and elevated design. Log into your Yoga C940 in less than two seconds with an integrated fingerprint reader. That’s three times faster than the average time it takes to type a password. Forget your password.