Is your computer screen not working?Here are some troubleshooting steps to take if your monitor is unable to display an image.Your coffee is brewed.There's your mind.You turn on your computer but nothing appears - all you see is a black screen and no explanation as to where the precious caps of the day are stored.A blank screen is difficult to diagnose because many things can cause it.Your entire computer may be faulty, or it may just be the monitor.Maybe you get a message like "No Input" or "Cable Not Connected" or maybe it's a completely black screen.Let's go over some troubleshooting steps so you can get back to working hard (or wasting time) on the internet.Have you tried turning it off and on again?This may sound obvious, but make sure your computer and monitor are actually turned on.Make sure your monitor is plugged in and getting power, then double check that both ends of the cable to your PC are firmly plugged in.Both should have lights in front of them that shine when powering up,You may have pressed the monitor's power button or tapped a plug with your foot without realizing it.This could be the reason why your laptop is plugged in but not charging.If your computer is on, try restarting it to see if the problem persists.You should be able to hold down your computer's power button until the light turns off and then turn it back on.Many laptops allow you to dim the screen to zero;so increase the brightness to see if this is the culprit.Your keyboard should have brightness buttons at the top, see if that fixes the issue.Similarly, the display might be disabled or confused after disconnecting it from an external monitor, so try holding down the function key and pressing any button on the top of the keyboard that looks like a computer screen.Try Another ScreenIf you're not currently using an external monitor, you may want to install one to see if the problem is with your laptop's screen or its internal components.You can also use your television for this purpose.If you can get a picture on the second screen, it may mean that your computer is able to display a picture but there is a problem with the built-in display itself.A faulty screen will need to be replaced.If you have a screwdriver, you can replace the panel yourself.Otherwise, it might be time to call the pros - hopefully you have a good backup in case they have to wipe the drive.Change Signal SourceMake sure your monitor is in the correct input.Most should auto-detect the correct input, but it never hurts to double-check.You may even need to unplug the monitor completely.When plugged into a disconnected jack I had a screen that refused to show a picture until I unplugged it.If your monitor is plugged into an unplugged port, you may need to plug something into that port before switching the inputs to the correct one.It's rare, but it happens.Check Your CablesIf you have a graphics card, your monitor should be plugged into it and not the HDMI port on your motherboard.If you have extra cables around, try another one;the cable you are using may be damaged or one of the ports may be faulty.You can also try a different cable type (for example, an HDMI cable instead of a DisplayPort cable) to see if that fixes the issue.Also, make sure your cable has the right specifications for the job.If you're using DisplayPort, make sure it's VESA certified;For HDMI, there may be a certification label on the packaging that you can scan with the HDMI Cable Certification app for iPhone or Android.Note that not all cables are created equal: If you're trying to run a 4K display at a high refresh rate, you'll need an Ultra High Speed ​​HDMI cable instead of an older High Speed ​​model.If you're using adapters, these could also be the culprit - either you have a faulty dongle or you're using it in a way it wasn't intended to be used with.HDMI-VGA adapters, for example, only work in this direction;if you are trying to connect a VGA computer to a DVI monitor, you will need a different type of active converter.Disconnect Your PeripheralsIt is also possible that one of your peripherals is causing an issue that will not allow the computer to boot.I've had situations where a certain USB port prevented the computer from turning on if something was plugged into the computer.Remove anything not needed from your computer (i.e. mouse, keyboard, printer, and monitor), then try rebooting.If everything works normally with the peripherals removed, one of these items is the culprit.You can narrow things down by rebooting with a single USB device connected to see how the computer responds at startup.Once you find the problem, you need to uninstall and reinstall the problematic drivers to see if it fixes the problem.In Windows, right-click the Start button and select Device Manager, then locate the peripheral in question.Right-click on the entry and select Uninstall device.Then you can reinstall the driver from the manufacturer and see if the issue is resolved.If you are trying to connect a second monitor to a laptop or desktop, you may encounter problems where only one of the displays works properly.First, make sure your laptop or computer can run two or more displays at the same time;some machines may not support all the monitors you want to connect.(M1 and M2 MacBooks, for all their improvements, support only one external display at a time, for example)If your second screen is recognized by the system but shows a black screen, you may have set it to only display an image on the laptop screen.In Windows, open Settings > System > Display and make sure the Multi-screen menu is set to mirror the desktop on both displays or extend the desktop to both displays.Mac users can go to System Preferences > Displays for a similar menu.Open Display Settings and select Extend Display from the menu.When your desktop computer boots up, you usually hear a small beep from a living speaker inside the tower.This speaker is there to give you error codes when something goes wrong.If you don't have it, you can order it from Amazon and plug it into the speaker header on your motherboard.If your PC is making a quick beeping sound when it boots, it is not registering any hardware issues.But if it makes a certain series of beeps—for example, one long beep followed by two short beeps—it's trying to tell you something.It could be a faulty RAM stick, an overheating CPU, or an improperly seated video card.(Other machines may have a digital display that shows error codes instead of beeps, or a series of lights that come on in a specific sequence to indicate a problem.)There are web pages with information about these beep codes, but your best bet is to refer to your own PC or motherboard's manual as it will be most accurate.Once you've fixed the problem, fixing it should be a breeze.Fix Your Boot SequenceSometimes your computer might try to boot from the wrong hard drive and when it can't find an operating system it just gives you a black screen (sometimes with a blinking cursor in the corner).This is easy to fix.Restart your computer and enter the BIOS setup menu, usually by pressing a key such as DEL or F2 during boot.Find the Boot Order option in the BIOS menu and make sure the correct hard drive is at the top of the list.Save your settings and exit.If you're lucky, you'll reboot into Windows.If that doesn't work, you can also try loading Optimized Defaults from the BIOS.If you've misconfigured anything else in the past, this will bring you back to default settings that might allow you to boot.(I recommend taking a picture of your BIOS settings first, in case you need something other than the default to boot properly. That way you can put everything back if resetting the defaults doesn't work.)Reseat Your Graphics Card, RAM or Other HardwareIf you've recently set up, upgraded, or moved your desktop computer, a piece of hardware may have come loose inside the case and is preventing the computer from booting.Remove the side panel from your PC and look inside.If you have a dedicated graphics card, try removing it and reinstalling it in the PCIe slot until it clicks, or try moving it to a completely different slot.Make sure the power cords are also firmly locked in place.Didn't this fix the problem?If you can get some, you may need to do more in-depth testing with spare hardware.Find a cheap video card on Craigslist and see if your current one works as a replacement - then the problem may be with your GPU and it's time to upgrade.Also reseat the RAM sticks while inside.Press the levers near the edges to disengage the rod from its seat, then press it again until you hear the latches click.Make sure all the cables connected to the motherboard are fully plugged in and your hard drive is connected.Buckle up for Safe ModeIf you still can't see an image when your computer boots, you may have a driver or other software problem.You can get an image if you boot in Safe Mode.If there is no image, your best bet is to interrupt the startup process three times (for example, by pressing the restart button as Windows starts up).You will be taken to the Automatic Repair menu where you can go to Advanced Options to find Safe Mode.If you can't get it to work, you can create a Windows install drive using another PC, boot from that flash drive, and then go to Repair Your PC > Troubleshoot > Startup Settings to select Safe Mode with Networking.If your computer boots in Safe Mode, you still have a chance to fix things.Try uninstalling any new programs that might be causing the problem.Make sure your resolution and refresh rate are set correctly (if you set them too high, your monitor may not be able to display the screen).You can also try reinstalling your graphics card drivers by downloading them from the manufacturer's website.If there are any remaining graphics drivers on your system, you can completely remove them by running Display Driver Uninstaller(Opens in new window).This tool is not for the faint-hearted, but it is the only way to truly delete every trace of a graphics driver from the system, which can sometimes cause problems.You might even want to go back to your recovery drive (for Windows or Mac) while you're there to scan for malware, use System Restore, or revert to a known working configuration if available.When you're done with that, see if your computer restarts normally.If not, you can go back to this troubleshooting menu and try the Startup Repair option.You can also go to Command Prompt and run sfc /scannow or chkdsk C: /r to check for driver errors;If you're lucky, Windows can repair the problems and get you to reboot.Haberler.com: Turkey's most comprehensive news website.Breaking news and the latest news on Haberler.com.