How to Fix Excel Flickering on an External Monitor in Windows 10
Question details
The user is experiencing intermittent screen flickering when using Excel for Microsoft 365 on an external monitor.
- Product
- Excel for Microsoft 365
- Device & OS
- Windows 10
- Scenario
- Working on an extended external display connected via a docking station, particularly when applying cell formatting or navigating large workbooks.
- Observed behavior
- The Excel application window flashes or flickers disruptively on the external display, while other applications may remain unaffected.
Ensure your docking station connections are secure and try plugging the monitor directly into your computer's HDMI or DisplayPort to rule out a hardware connection issue.
Update Windows Display Drivers
Outdated or corrupted display drivers are the most common cause of screen flickering on external monitors connected to Windows 10.
Display drivers manage how applications render on your screen. When connecting via a docking station to an external monitor, outdated drivers can struggle to render hardware-accelerated Office applications like Excel.
Right-click the Start button (or press Windows Key + X) and select 'Device Manager' from the menu.
Click the arrow next to 'Display adapters' to expand the list and reveal your graphics card.
Right-click your graphics card, select 'Update driver', and choose 'Search automatically for drivers'. Follow the on-screen prompts and restart your computer if necessary.
Adjust Windows Graphics Settings for Excel
Modifying how Windows handles graphics processing for Excel can resolve rendering conflicts on extended displays.
Update Microsoft Office
Installing the latest updates for Microsoft 365 ensures you have the latest bug fixes for multi-monitor display issues.
Switch to WPS Office for a Stable, Flicker-Free Experience
If Excel continues to struggle with display issues on your external monitor or docking station, consider switching to WPS Office. It provides a highly compatible, lightweight alternative optimized for multiple displays and diverse hardware configurations without heavy system resource demands.
Frequently Asked Questions
Why does Excel only flicker on my external monitor and not my laptop screen?
This usually happens because the external monitor relies on a docking station with limited bandwidth, uses a different display driver, or has an incompatible refresh rate compared to your primary laptop screen.
How do I check my Excel version and Windows version for troubleshooting?
To check your Excel version, open Excel, click 'File', and select 'Account'. Your build number is listed under 'About Excel'. To check your Windows version, press Windows Key + R, type 'winver', and press Enter.
Can a faulty HDMI or DisplayPort cable cause Excel to flicker?
Yes. A damaged or low-quality video cable can cause signal drops that mimic software flickering. If the issue occurs exclusively on the external monitor, try replacing the cable or bypassing the docking station.
Does Windows 10 have a built-in way to test if the flickering is caused by the app or the display driver?
Yes. You can test this by opening the Task Manager (Ctrl + Shift + Esc). If the Task Manager window flickers along with Excel, it is likely a display driver or hardware issue. If the Task Manager does not flicker while Excel does, the issue is isolated to the Excel application.
