Had a Power Outage and now 1 of my monitor's wont work?

Hey sorry for late reply. I talked to my local computer store who is also a family friend. He thinks same way I do he thinks because of power outage my monitor got fried somehow through the power cord for the monitor due to face it was showing the resolution wrong and it was in a tiny little box with complete black outer part around the screen. That being said Thank you for your help but I am going to send it back since i paid for warranty. Which they cover the power surges when electricity goes off Thanks again have a good one

Hi There,

Thanks for the follow up responce. I really do appreaciate your patience here. I do apologize to hear that you are still stuck on the process.

Let us try these steps on what to do next:

► Do a fresh graphics driver install with DDU

This will remove any corrupted display data (like EDID) that Windows may be stuck with.

• Download DDU (Display Driver Uninstaller) from: https://www.wagnardsoft.com/

• Boot your PC into Safe Mode

• Run DDU and choose:

>> Clean and Restart for your GPU (NVIDIA/AMD)

• Once your system restarts

• Install the updated GPU drivers from the official website:

>> https://www.nvidia.com/Download/index.aspx

>> https://www.amd.com/en/support

This resets all monitor detection settings and can fix signal/resolution mismatches.

► Check monitor firmware (if supported)

• Visit your monitor brand’s support site (e.g., ASUS, LG, Acer)

• Find the firmware updater made for your model

• Some monitors store refresh/resolution configs internally, and this can reset them

► Test the affected monitor alone

Even if it worked before with all displays:

• Disconnect all other screens (including your TV)

• Use only the problematic monitor via DisplayPort

• Restart your PC and try setting 2560x1440 @ 144Hz again

This rules out bandwidth limitations or GPU display routing issues after the power reset.

► Optional Step Manually remove EDID data

Hopefully this solves the issue for now.

Best Regards,

Kelvin || Independent Adviser

Ive done step 1 & still have the same problem.
I did step 2 & still have the same problem.
I did step 3 but I will attach a photo of what my computer says on Windows vs what the Monitor says using the physical buttons below.
![Image](https://learn-attachment.microsoft.com/api/attachments/1a7a4bb8-6f63-4e08-924d-809c7c7ad8bd?platform=QnA"https://learn-attachment.microsoft.com/api/attachments/91d99498-9715-420c-869a-4fc77334f9d2?platform=QnA" title="filestore.community.support.microsoft.com" rel="ugc nofollow">

I just had everything running just fine literally 8 hours ago. Ive done all of those steps already to be honest.

I dont know what is going on :( I might add again I had no issue running my 3 2k monitors at 2560x1440 at 144 hz constantly I also had my 4k TV running perfectly fine at 3560x2160 at 144 hz. While on internet or playing a high FPS game or any game. For what ever reason after the outage just 1 monitor isn't working now. Anytime i change it to 144hz it changes resolution to 1920x1080 i even tried 2 brand new HDMI which did nothing. I also did a display port as suggested with no luck either

Hi There,

Thanks for reaching out Microsoft Community Forum. I totally understand your concern about your monitors are not working properly after power outage. Allow me to help.

Follow these steps to help you resolve the problem:

► Step1: Fully Restart everything

• Turn off your PC and the monitor

• Unplug them from the wall for 5 minutes

• Then plug them back in

• And turn them on

This resets any display glitches caused by the power outage.

► Step2: Try a DisplayPort Cable

• If you’re using HDMI

• Try a DisplayPort cable instead

• Sometimes HDMI doesn’t send the correct info after a power issue

► Step3: Check Monitor Settings

• Use your monitor’s physical buttons

• On the side or bottom

• Look for settings like Refresh Rate or Game Mode

• Make sure it’s not stuck in a low mode like 60Hz or ECO mode

► Step4: Reset Display in Windows

• Right click on your desktop

• Click Display Settings

• Scroll down

• Go to Advanced Display Settings

• Select the monitor that is not working

• Try changing the refresh rate to 144Hz

If nothing works:

• Press Windows + X

• Click Device Manager

• Expand Monitors

• Right click the monitor

• Then choose Uninstall

• And Restart your PC

Windows will reinstall the monitor and may fix the settings.

► Step5: Reset NVIDIA Settings

• Open the NVIDIA Control Panel

• Click Manage 3D settings

• Click Restore Defaults

• Then check the display setup again

Note:

Try using just that one monitor alone (disconnect the others) to see if it runs correctly. If it works by itself, it might be a problem with bandwidth or too many displays connected.

If still not working:

The power outage might’ve messed up the monitor's internal settings. You can:

• Try the monitor on another computer

• Or contact ASUS Support and ask if they have a reset tool or firmware update

I hope this helps and works for you.

Best Regards,

Kelvin || Independent Adviser