LG Monitor Not Working

troubleshoot lg monitor

Monitors not working are generally a sign of a defective video card or an improper graphics driver. However, sometimes, monitors fail for other reasons. If your LG monitor isn’t functioning or is improperly functioning, try to follow this guide to understand why and fix the issues.

Test if the Monitor is Properly Powered

To help diagnose where the problem is, you should test to make sure that your monitor itself is not the problem. LG Monitors use energy-saving technology, so if there’s no signal, they may appear to be off – but there should be an indicator light somewhere on the model. Check to see if it’s powered.

  • Do you have a power strip that the monitor is plugged in to?
    • Is power supplied to the other devices plugged into the strip?
  • Is there a standby light when the monitor is plugged in? Does toggling the power make anything happen?
  • Do you have any other devices you can plug in? Does the monitor work when they are plugged in instead?

If the power is working to everything else, but the monitor still isn’t working, it could be the power cable for your LG monitor. See if replacing the LG Power Cable fixes the issue. You can call or contact LG to get a replacement power cable.

Test if your Video Cables Work

If your monitor seems to be receiving power, but no signal is provided when plugged in, you could have a frayed video cable.

  • Try using the cable you have hooked up with another device. Does that one also perform similarly? Are you getting an error on your LG monitor?
  • Try replacing the cable that you’re using. Most monitors use either VGA, DVI, Display Port, or HDMI to connect to a computer. Determine which one you use with your computer and see if you have a replacement somewhere in the house. If you don’t, you can usually buy them for pretty cheap online or at major retailers.

If replacing a cable fixes the issue, discard the old cable and use the new one.

Test Another Display

This may be more difficult, but if your desktop or laptop has an HDMI port, try plugging it into a TV. Do you get a response from the TV when you’re on the correct channel? If so, your monitor may be broken or faulty. You should reach out to your retailer if your monitor is still under warranty, or reach out to LG to try to receive a replacement.

Graphics Card Problem

If your graphic card has multiple output ports on it, try a different port for your cable to see if the issue is the port. Sometimes, whether you’re on AMD or Nvidia, one of your outputs will fail. If this clears the problem, contact your retailer or manufacturer to try to get a refurbished card.

Sometimes, a faulty or out-of-date driver can cause graphics issues as well. If you’re on a desktop and you have an integrated graphics output, try plugging into that output and updating your video card’s drivers. If you’re on a laptop, try using your native screen and updating your graphics drivers as well as your chipset drivers.

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Are you using a different brand of monitor? Check out these helpful articles:

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21 Comments

  1. BIMAL May 12, 2020 at 2:24 am

    Monitor is blank with running desktop

  2. Matt G July 16, 2020 at 8:20 am

    Have you tried multiple cables? Could it be a bad cable? If multiple cables don’t work and it works with a different monitor, maybe the monitor is broken. Has it worked on other devices? Such as a phone, or a DVD player?

  3. ISMOIL July 30, 2020 at 9:42 am

    i contected cable to laptop from LG monitor. monitor is watching chek signal cable. but cable is new. what i do?

  4. Matt G July 30, 2020 at 11:49 am

    Does it work with other devices?

  5. ee lin November 30, 2020 at 8:22 pm

    skype call still connected but sound disappeared after i connected the HDMI cable to the monitor from my PC

  6. moella December 2, 2020 at 4:07 am

    laptop switch on when not housed when housed and the laptop monitor is plugged in it switch off but when the motherboard is alone on the table it switch on plz help

  7. claudine December 21, 2020 at 1:03 am

    Bought LG 27ML600 monitor and it does not appear to be working, can you please assist

  8. Matt G January 20, 2021 at 8:15 am

    What’s not working with it?

  9. Matt G January 20, 2021 at 8:17 am

    The computer is probably trying to route the audio through your HDMI cable. Check your Skype audio settings to see the output device!

  10. Tomson February 7, 2021 at 5:29 am

    The monitor comes on but wen l connect hdml or vga cable it doesnt function keeps on switching off and l cant operate it

  11. Gerhard February 10, 2021 at 3:49 pm

    I just bought the LG 27GN850 Ultragear – QHD Nano-IPS Gaming Monitor – 144hz – 27 inch and i totally get no signal. I have looked on the web for solutions but that didn’t work either and i have tried different DisplayPort and HDMI cables but the monitor gives no signal on both my computers. What am i doing wrong here? How can i get a signal because it is the monitor that ain’t working.

  12. Abhijeet Bishwas February 24, 2021 at 11:41 am

    My lg 22″ LCD monitor is showing double screen side by side in one lcd kindly help me in resolving this problem.

  13. Linuxman April 20, 2021 at 4:04 pm

    New LG monitor has double and hdmi connectors, once in a while it’ll go blank for 5 seconds while I’m working on the terminal,could LG be a peice of crap?

  14. rabi April 25, 2021 at 9:12 am

    when connected with laptop it is working but not with desktop

  15. Thomas Bernecky May 23, 2021 at 6:01 pm

    No signal on new 27mk430 b H display? Reseated power cord both ends , no luck. Ttried with another Hdmi cable, no luck. Desktop, keyboard and mouse are powered

  16. Federico J. Muniz May 27, 2021 at 1:50 pm

    My 24 inch LG Monitor doesn’t responds when connected with my Mac 13 inch

    Thanks for your Help!

  17. Mad Zach May 29, 2021 at 8:43 am

    My H/P does not have HDMI ports, so I used the VGA. I get the message “not connected” on the LG monitor. BUT, when I hooked up my OLD monitor to the same cable, it all works fine.

  18. George May 31, 2021 at 1:51 pm

    The monitor comes on but wen l connect hdml or vga cable it doesnt function keeps on switching off and l cant operate it

  19. […] LG 22” FHD 75Hz 1ms GTG TN LED FreeSync Gaming Monitor (22BK400H-B) – Black. Model Number: 22BK400HB … Sold and shipped by Best Buy Business.CA$157.99LG Monitor Not Working | Troubleshoot LG Monitorhttps://www.driversupport.com › knowledge-art… […]

  20. Shakib July 3, 2021 at 4:09 pm

    My lg 22MP68VQ-P has a defect last night. Multiple rays horizontally at windows taskbar position. How this happens and how to solve?

  21. Yamo787 August 1, 2021 at 10:31 am

    I have the lg 24gn50w and I cannot get any signal from my xbox series s. I have try diferent cables and the monitor still doing the same. I plug my xbox in other monitor and is working.
    What can I do to fix this. Thanks

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