![]() I wouldn't even have thought of TeamViewer since I've done this on many other PC's with no problems. Immediately my eyes weren't straining anymore. If the Fn key did not work with the function keys to change the brightness, boot your laptop into BIOS, check if there is a setting in there to switch between Function keys and Action keys. Scroll down to "Advanced network settings" and clicked "Uninstall" next to "Install monitor driver". This might be a long shot (that too in the dark) but do you use TeamViewer, and if so, did you recently try installing its monitor driver? If the answer is "Yes, I have, smartass, but the problem isn't gone", then it sounds like the display driver somehow got corrupted. Sorry, that really is the first thing that comes to mind. Have you tried turning it off, then turning it back on? Cannot seem to figure out why my screen is so dark I went into the power settings and made sure the slider on the brightness level was at its highest level. I recently upgraded to 8.1 and now the function key to adjust brightness does not affect brightness. Expand Display Adapters and see if the Generic PnP Monitor is accidentally disabled. Type in devmgmt.msc and hit OK to open the Device Manager.I have a Lenovo laptop that I purchased with Windows 8.Press and hold the Windows key, then press R. ![]() We will be using the integrated Device Manager. There are a number of ways for automated driver updates. Always ensure that the URL address of the website you’re downloading from matches the official manufacturer's website. Never download drivers from a third-party website - these files can be malicious and might harm your computer. If you’re unsure, you can always search on Google or contact the customer support of your manufacturer. PC Data Center Mobile: Lenovo Mobile: Motorola Smart Service Parts My Account / Anguilla Antigua and Barbuda Argentina Aruba Australia Austria Bahamas Bangladesh Barbados Belarus Belgium Bermuda Bolivia Brazil Bulgaria. Make sure that you’re always downloading and installing the correct driver that matches your graphics card. Brightness control not working in Windows 10 ThinkPad X1 Yoga, X1 Carbon (Type 20FB, 20FC) SHOP SUPPORT.
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