If your computer is, in fact, showing information on the monitor, but is still not booting fully, see How to Fix a Computer That Won't Turn On for a better troubleshooting guide. When a display problem occurs, the monitor itself can often be the focus of your diagnostic efforts, but the graphics card your PC uses is often the bigger culprit. However, this does not necessarily rule out a further software issue. If you’ve haven’t recently changed your display settings, then your monitor resolution could have been changed automatically. This delay provides time for some recharging of the CMOS battery, which may have been drained. Ben Stockton is a freelance technology writer based in the United Kingdom. Michael Heine is a CompTIA-certified writer, editor, and Network Engineer with 25+ years' experience working in the television, defense, ISP, telecommunications, and education industries. For instance, outdated drivers or incorrect display resolution could still cause this fault, so you’ll need to investigate further. How to Fix Your PC Turns On but No Display Method 1. Power supplies can work in varying degrees—one that isn't fully functional needs to be replaced. Equally, your monitor can sometimes support resolutions that your graphics card doesn’t yet support, especially if you’re moving to a 4K monitor or from a 60Hz to a 240Hz display. Plug it in, switch it on—it sounds easy enough to get your PC running, but it isn’t always that easy. Thankfully, this kind of problem is usually easy to troubleshoot. There's a good possibility that your PC wouldn't power on at all if this switch is wrong, but an incorrect power supply voltage might also prevent your computer from starting properly in this way, too. We address this component separately only because the chance of a CPU coming loose is very slim and because installing one is a sensitive task. Help Desk Geek is part of the AK Internet Consulting publishing family. If the display shows diagnostic information of any kind, you know the display is powered and is capable of displaying content. A beep code will give you a very good idea of exactly where to look for the cause of your computer turning off. If you don't have a POST card or spare parts to swap in and out, you're left not knowing which piece of your essential PC hardware is faulty. A beep code will give you … If the problem is replicated, this would likely indicate a problem with your PC that you’ll need to diagnose further. The purpose here is to remove as much hardware as possible while still maintaining your PC's ability to power on. In these cases, you have little option than to rely on the help of individuals or companies that do offer these resources. He writes troubleshooting content and is the General Manager of Lifewire. I graduated from Emory University with a degree in Computer Science and Mathematics. Since your computer powered on with only the essential hardware installed, those components must work properly. In case if your laptop doesn’t show you any sign of power supply, then it means that you have a different problem with your laptop and now the only thing what you can do is to use some different (but same) Power Adaptor on your laptop just for the testing purpose. The power/battery is working perfectlly though. This can sometimes immediately resolve any issue with your monitor display. Try these common fixes in the order we present them: Test your monitor. If your computer starts normally with only essential hardware installed, proceed to Step 11. Test after each hardware replacement to determine which component is defective. This means that one of the hardware components you removed is causing your PC to not turn on properly. How to Fix a Clock_Watchdog_Timeout BSOD in Windows 10, How to Customize Windows 10: A Complete Guide, Windows 10 Unnecessary Services You Can Disable Safely, Tribit Noise-Cancelling Headphones Review, Use MSStyles to Theme Wine Applications In Linux. If this is the case, make sure that the input source on your monitor is correctly set. He has a degree in History and a postgraduate qualification in Computing. Clearing the BIOS memory on your motherboard will return the BIOS settings to their factory default levels. Most display monitors have multiple input sources available, including VGA, HDMI, and DVI inputs. Replace your power supply immediately if it fails any test you perform. Verify that the power supply voltage switch is set correctly. This might be the case if your display takes a long time to switch on, for instance. Reinstall each piece of hardware that you removed in Step 10, one piece at a time, testing after each installation. After replacing the power supply, assuming you do, keep your PC plugged in for 5 to 10 minutes prior to turning it on. Investing in the right PC hardware is essential—you don’t want to end up in the same situation a year or two into the future. You may also find that the display cable itself is at fault. This includes support for new monitors and display resolutions. Before you start banging your head against the wall. A no signal error on a monitor can leave you scratching your head without answers. If your PC’s graphics card is set to a display resolution above what your monitor is capable of displaying, you’ll likely see a blank screen or a no signal message appear. This can sometimes happen if the input source on your monitor is set to the wrong device. This is a simple check to complete. It doesn’t matter if your PC fans are spinning if you’re seeing nothing on your monitor that allows you to actually use it. By installing each device back into your PC and testing them each time, you'll eventually find the hardware that caused your problem. Alternatively, use the 15-second window to change your resolution for a bit of a trial-and-error. You see lights on the computer case, probably hear fans running from inside, and may even hear sounds, but nothing at all shows up on your screen. A no signal error on a monitor could be a sign that your PC monitor is ignoring the graphics output from your PC. If some of the more common fixes don’t work, then it points to a likely hardware fault that you’ll need to investigate for repair or replacement. Start your computer with essential hardware only. Copyright © 2008-2020 Help Desk Geek.com, LLC All Rights Reserved. If you’re seeing a blank screen on a new monitor, then it’s likely that a new graphics card driver is in order. A BIOS misconfiguration could be why your PC won't start up all the way. If clearing the CMOS does fix your problem, make sure any changes you make in BIOS are completed one at a time so if the problem returns, you'll know which change caused your issue. Read Ben's Full Bio. Subscribe to Help Desk Geek and get great guides, tips and tricks on a daily basis! Make sure your computer has completely restarted.. We only send useful stuff! You should look at your repair options under warranty or, failing that, consider buying a new monitor. Replace the defective hardware once you've identified it. Cheap isn’t always cost-effective, but make sure to consider your budget carefully before you rush to buy new PC components, or a new PC or monitor entirely. If you see cable damage, or if the cabling is quite old, swap it out for an alternative. The steps above should help you troubleshoot the issue, but you may need to look at diagnosing your monitor or PC further to consider whether you’re due a replacement or repair under your device warranty.