Small black lines near the center of an ASUS VG279Q1A do not automatically mean the monitor needs replacing. A cable, computer, or monitor fault can produce display problems; the lines’ appearance alone cannot identify which one. Check whether they show in the monitor’s own menu, then test a known-good cable and another computer before deciding what to do.
What black lines on an ASUS VG279Q1A can tell you
A Windows 11 Forum post describes small lines near the center of the screen that were easier to see over bright red or yellow images. That description is useful for recognizing the symptom, but it is not a confirmed diagnosis or evidence that a repair was tested. ASUS lists lines among the display symptoms to troubleshoot, but the available guidance does not establish the cause of this particular monitor’s lines.
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A line across multiple pixels is not necessarily the same issue as an isolated bright or dark dot. Do not assume the panel, graphics card, or any specific component has failed based on appearance alone.
Check whether the lines follow the monitor
1. Look at the monitor’s own menu
Photograph the lines so you can compare what changes during testing. Open the monitor’s on-screen menu, or check the display when no computer is actively supplying an image. If the lines also appear over the menu or no-signal screen, that is a useful clue that the symptom may not be limited to the computer’s image. It is an observation, not a definitive diagnosis.
#1 Best Overall
- High-Resolution QHD Gaming Display: 27-inch QHD (2560 x 1440) gaming monitor with 180Hz refresh rate designed for professional gamers and immersive gameplay
- ASUS Extreme Low Motion Blur Sync Technology: ELMB Sync technology enables ELMB and variable-refresh-rate technologies to work simultaneously to eliminate ghosting and tearing for sharp gaming visuals with high frame rates
- Advanced Synchronization Technologies: FreeSync Premium, G-Sync compatible and AdaptiveSync technology delivers a seamless, tear-free gaming experience by enabling VRR (variable refresh rate) by default
- High Dynamic Range Support: HDR technology supports HDR-10 format to enhance bright and dark areas for improved visual depth and contrast
- Package Contents: DisplayPort cable, L-shaped Screwdriver, Power cord, Power adapter, Quick start guide, Warranty Card
2. Reseat the signal cable
Turn off the monitor and computer. Disconnect and firmly reconnect the HDMI or DisplayPort cable at both ends, checking that the connector is secure and that pins are not bent. ASUS recommends checking signal-cable connections and pins when troubleshooting lines and other display issues.
3. Try a known-good cable
Connect a suitable cable that you know works, matching the port in use. The VG279Q1A has HDMI and DisplayPort inputs; use the corresponding cable type. If the symptom disappears, the original cable or connection may have been involved. A replacement cable will not fix a persistent monitor hardware fault.
Rank #2
- 27-inch Full HD (1920 x 1080) IPS gaming monitor with ultrafast 165Hz refresh rate designed for professional gamers and immersive gameplay
- ASUS Extreme Low Motion Blur (ELMB ) technology enables a 1ms response time (MPRT) together with Adaptive-sync, eliminating ghosting and tearing for sharp gaming visuals with high frame rates.
- FreeSync Premium technology to eliminate screen tearing and choppy frame rates
- Shadow Boost enhances image details in dark areas, brightening scenes without over-exposing bright areas
- Robust Connectivity with DisplayPort (v1.2), HDMI (v1.4.) x2 ports
4. Compare another computer or display
Connect the VG279Q1A to another computer, or connect the current computer to another display. If the lines appear only with one computer, investigate that computer or its output connection. If they follow the VG279Q1A to another source, the monitor becomes more suspect. These comparisons help isolate the problem, but they do not identify a failed component.
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Use the monitor’s on-screen menu and select Menu > System Setup > Reset > Yes. ASUS includes a monitor reset in its general LCD troubleshooting guidance.
Rank #3
- 27-inch Full HD Fast IPS Display: Features a 1920 x 1080 resolution Fast IPS panel with 240Hz refresh rate for fast paced gameplay
- Ultra-Fast Response Time: ASUS Fast IPS technology enables a 0.3ms (min) response time for sharp gaming visuals with high frame rates
- Adaptive Sync Technology: FreeSync Premium and G-Sync compatible delivers a seamless, tear-free gaming experience
- Advanced Motion Blur Reduction: ASUS Extreme Low Motion Blur Sync (ELMB SYNC) technology enables ELMB together with variable refresh rate, eliminating ghosting and tearing for sharp gaming visuals with high frame rates
- Convenient Monitor Control: DisplayWidget Center enables easy OSD access and monitor settings adjustments with a mouse
When to contact ASUS or arrange service
If the lines remain after testing another suitable cable and another source, contact ASUS Customer Center or an authorized service location for diagnosis. ASUS’s troubleshooting article says to contact its Customer Center if the listed steps do not solve the problem: ASUS LCD monitor troubleshooting.
Before seeking service, check coverage for your country and specific unit using its serial number and proof of purchase. Being about three years old does not by itself establish whether warranty coverage applies. ASUS provides model-specific support and manuals for the VG279Q1A.
Rank #4
- High-Resolution QHD Gaming Display: 27-inch QHD (2560x1440) gaming monitor with 300Hz refresh rate designed for professional gamers and immersive gameplay
- Fast IPS Technology with Rapid Response Time: ASUS Fast IPS technology enables a 0.3ms (GTG) response time(min.) for sharp gaming visuals with high frame rates
- Advanced Motion Blur Reduction: ASUS Extreme Low Motion Blur Sync (ELMB Sync) technology enables ELMB and variable-refresh-rate technologies to work simultaneously to eliminate ghosting and tearing for sharp gaming visuals
- Convenient Settings Management: DisplayWidget Center enables easy monitor settings adjustments with a mouse
- Enhanced Dark Scene Visibility: Shadow Boost enhances image details in dark areas, brightening scenes without over-exposing bright areas
Do not open the cabinet or attempt a screen repair. ASUS’s VG279Q1A/VG279QL1A user guide warns: “Do not repair the screen by yourself!”
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Should you replace the monitor?
Not based on the lines alone. First see whether they remain with another source and cable, and ask ASUS or an authorized service provider to diagnose the monitor if they do. Decide between repair and replacement after you have a service assessment and know any applicable warranty coverage and repair cost. The available information does not establish this unit’s failure mode or whether a particular repair would work.
Quick Recap
Best Value
- 27-inch 4K Ultra HD Display: Features 3840 x 2160 resolution gaming monitor with ultra-fast 160Hz refresh rate designed for professional gamers and immersive gameplay
- ASUS Extreme Low Motion Blur Sync Technology: ELMB Sync technology enables ELMB and variable-refresh-rate technologies to work simultaneously to eliminate ghosting and tearing for sharp gaming visuals with high frame rates
- Advanced Synchronization Technologies: NVIDIA G-SYNC Compatible, AMD FreeSync Premium, and exclusive Variable Overdrive technology ensure seamless, tear-free gaming experience
- Superior Color Performance: High dynamic range (HDR) technology and 95% DCI-P3 professional color gamut provide amazing color accuracy and vibrant visuals
- Package Contents: Includes DisplayPort cable, L-shaped Screwdriver, Power cord, Quick start guide, and Warranty Card
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