TVs · LG
LG OLED evo Pink or Green Line on Screen
A vertical pink or green line on your LG OLED evo TV indicates a driver voltage issue, ribbon cable contact failure, or panel damage. Here is how to diagnose whether it can be fixed with software or requires hardware service.
Symptoms
- Single pixel-wide vertical pink or green line running from top to bottom
- Line visible across built-in LG webOS menus and internal apps
- Line flickers or changes color when the screen warms up
- Multiple vertical colored lines appearing after physical movement or mounting
- Line disappears temporarily when gentle pressure is applied to the bezel
- Line remains during video playback on all HDMI source inputs
Quick troubleshooting
Step 1
Perform a Hard Power Cycle
Unplug the LG OLED evo from the wall outlet completely. Press and hold the physical power button on the TV frame for 30 seconds to drain remaining power from the capacitors. Leave the TV unplugged for 10 minutes before plugging it directly back into a wall outlet.
Step 2
Run a Manual Pixel Refresh Cycle
Navigate to Settings > General > OLED Care > OLED Panel Care on your LG remote. Select Pixel Cleaning (or Pixel Refresher) and start the process. Allow the TV to shut off and run this recalibration process uninterrupted for up to an hour to normalize row driver voltages.
Step 3
Isolate the Input Source
Press the Home button on your Magic Remote to overlay the webOS interface on the screen. If the green or pink line cuts through the menu graphics, the issue is hardware-based inside the TV. If the line disappears on internal menus, test different HDMI cables and external source devices.
Step 4
Perform a Frame Flex Test (Diagnostic Only)
With the TV turned on, lightly press the lower or upper bezel directly above or below where the vertical line resides. If the line flickers, disappears, or turns white, the issue is a failed physical connection on the driver ribbon. Do not squeeze hard, as OLED panels are fragile.
Step 5
Inspect and Reseat Internal Ribbon Cables (Advanced)
If your display is out of warranty and you are experienced with electronics, remove the back cover to access the mainboard and panel driver connections. Carefully unlock the flexible flat cable (FFC) connectors, clean the contacts with isopropyl alcohol, and reseat them firmly. If the line persists, the panel's micro-bonded tab has failed.
Likely causes
- Chip-on-Film (COF) driver tab de-bonding from the OLED panel edge
- T-Con board or mainboard ribbon cable oxidation or loose connection
- Physical micro-fracture on the glass substrate or gate driver line
- Temporary webOS image processor cache bug or voltage anomaly
- Excess thermal expansion degrading the panel edge connections
- Faulty internal power distribution line feeding panel drive ICs
What's going on
Seeing a bright pink, magenta, or neon green vertical line cut straight through your LG OLED evo screen is frustrating. The LG OLED evo series utilizes high-luminance panel technology driven by thin flexible ribbons along the frame edges. When a specific column driver loses control voltage or breaks communication with the panel board, an entire vertical row of pixels defaults to a solid brightly colored state.
Symptoms people notice
- A crisp, razor-thin pink or green line spanning top-to-bottom.
- The line stays visible over Netflix, YouTube, webOS menus, and external consoles.
- The vertical stripe appears after the TV has been running for 15–30 minutes.
- The line changes color or intermittently flickers if the TV chassis is bumped.
- Multiple parallel lines forming over time on older panels.
Likely causes
In self-lit display architectures, vertical line anomalies are almost always tied to signal path continuity:
- Tab Bonding Failure (COF): The Chip-on-Film ribbon connector attached directly to the panel glass has separated due to heat or physical flex.
- T-Con / Drive Board Disconnection: A loose or oxidized ribbon cable between the logic board and panel drivers.
- Physical Panel Damage: Small cracks near the bezel driver edges caused during unboxing, mounting, or moving.
- Processor Bug: Temporary rendering errors within the webOS system logic.
Quick checks first
Start by eliminating external equipment. Unplug all HDMI sources and bring up the built-in system menu on your LG TV. If the line remains in the exact same spot across all native screens, external inputs are fine and the issue is internal. Next, run an automated pixel maintenance routine via the display settings. You can read more about common image artifacts on our TV problems hub.
When it's a real hardware fault
If a power cycle and pixel cleaning cycle fail to remove the vertical line, the fault is physical. Single-pixel lines that stay constantly illuminated indicate a severed connection or damaged gate driver channel on the panel substrate. Unlike traditional LED-backlit TVs where replacing a T-Con board frequently fixes line artifacts, vertical lines on OLED displays are usually tied directly to non-removable driver films on the glass frame.
Soft resets vs board/panel work
Soft resets, power drains, and pixel cleaning routines are risk-free steps every owner should perform first. Inspecting and reseating internal mainboard ribbon cables requires removing the rear chassis and handling sensitive zero-insertion-force (ZIF) latches. However, if the tab bond on the panel glass itself has detached, replacing circuit boards rarely remedies the issue. On premium displays like the LG OLED evo series, an actual panel replacement is required to eliminate bonded glass driver failures.
Next steps
If your TV is still under manufacturer warranty or extended protection, submit a claim with LG right away with clear photos of the vertical line. If the TV is out of warranty, evaluate the cost of panel service against buying a replacement unit. Explore display reliability rankings and technology comparisons on our reviews section to help decide your best path forward.
Next steps
Try the DIY guide if you're comfortable opening the device. Still stuck? Browse related problems for similar symptoms.
