A computer randomly shutting off can also be an issue with the computer or video card overheating or a defect with the video card. She usually can turn it back on by moving her mouse. You attach the computer to the docking station. Open the lid. I plug in the first one (Samsung) via HDMI (it works fine, the laptop detects and prompts it). How do I fix this? Whenever I'm playing games my monitor decides to "turn off" (it loses signal to DVI, enter power-saving mode) and I have to re-boot the PC for it to work again. Where it says "Multiple Displays" select your external monitor, for me I chose "Show only on 2". Each time I plug the HDMI the screen goes black and I do not see anything on the external monitor either even though I have told it to duplicate my screen. In Windows 10 right-click on the desktop and select "Display Settings". If the video card is a known good video card or its part of the motherboard, there may be problems with the motherboard. Any ideas what's going on here? When I unplug the HDMI, the screen comes back. Type your password. I have a Dell N5110 (64 bit OS), running Windows 7. Check the box "make this my main display" for the external monitor. Screen turned pinkish with green lines - Lenovo Y50 laptop: HELP! Previously, with Windows 7 EliteBook laptop and dock, the same external monitors seemed to honor the Windows setting: "While Plugged-in, Turn off display: X" where X might be 'after 2 hours or 'Never' and the screens could stay on (not power-save) for days. After it happened 5 times today, she was not able to turn it back on so I had to disconnect and reconnect the VGA cable to get it to work again. Infopackets Reader 'Tina' writes: " Dear Dennis, My monitor keeps going black. P.S. Turning on Laptop through external keyboad "Second" monitor turns off when closing laptop lid: Solved! Occasionally, my laptop screen will turn off while I'm in the middle of using my laptop. You turn on the computer and then close the lid. But all of a sudden, now when it close the laptop the display turns off entirely. There are two separate monitors, excluding the Laptop screen itself. In Display Settings, click the Detect button. Close the lid. Use either of the following methods to force detection of the external monitors: Use the keyboard shortcut Win+Ctrl+Shift+B. I've even made it so it doesn't go to sleep when closing the lid, and it still shuts off. Therefore, the external monitors display a black screen. It flashes on and then off after a few seconds, then it goes to a black / blank screen. Expected result: The laptop wakes, the display shows the login screen and remains on. When you close the laptop the external screen will turn off but will come back on when you click the mouse. Hi all, I'm trying to connect 2 external monitors to my laptop. My video card isn't working. I use an external monitor. Workaround: When I close the laptop lid, the primary monitor stays on, and the secondary no longer gets a signal. I recently turned off and uplugged the laptop. Can't find anything in HP or Windows 10 Support covering this issue. But when the laptop is open, both the monitors, and the laptop screen show up fine. When this happens, my monitor power light stays yellow as if the monitor is Normally when I close the laptop, the external monitor adjusts to its resolution and works fine. I am not doing anything to cause it to turn off, and when the screen goes dark, all I have to do is move the mouse and the screen comes back on. The PC however, doesn't turn off as I can still see the LED light on the front of the case turned on and fans etc inside are still hearable. When I reconnected and tried to plug the HDMI cord in, the laptop screen went black. Monitor won't turn on :(, works fine with external monitor + image when shone with light: Solved! Plug in your laptop. I replaced it with another computer and now one of her two monitors turns off after a few mins. 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