Member Avatar for Member #146809

Hey all,

I have an LCD monitor that is just over a year old and has recently started to exhibit some pixel errors. I have 2x 2-pixel wide vertical lines (1 red, 1 blue), 1x 1-pixel wide vertical line (green), and 2x 1-centimeter wide vertical areas that show these errors.

The errors only show up with certain levels of gray. I can have a pure red or blue or green screen and there would be no problem. No errors show with even a black desktop, but with a certain shade of any color (including most prominently grayscale) most of the error shows up.

Note that these are neither stuck nor dead pixels as with most colors and shades, they do not show. However, I am a gamer and in worlds of multiple shades and colors, this is completely unacceptable.

I have swapped out the monitor for another 19" LCD of the same specs but different make/model and the problem is non-existant thus leaving the error to the monitor itself.

I have tried all combinations of suggested resolutions, colors, and refresh rates. I have tried analog cables and DVI and the problem persists. I have uninstalled and wiped the drivers for all relevant components and reinstalled them.

I am not ready to give up on my investment now, so any suggestions are welcomed.

Thanks in advance.

PS -- I have no camera so I can't take a picture of the error. I will see about posting one soon enough.

Computer Specs:

AMD AthlonXP 2000+
MSI KT3 Ultra2, Via Kt333 chipset
512MB PC2100 RAM
Leadtek Geforce6600 GT
SoundBlaster Audigy
Generic Ethernet Card
Generic TV-Adapter

  • 3 Contributors
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  • 3 Years Discussion Span
  • Latest Post Latest Post by Computer-Crash

Dani AI

Generated

Symptoms like thin colored vertical lines that only appear at specific mid-tone grays are most often a fault in the monitor’s internal electronics (the timing controller/T-CON, column/source-driver ICs, or the panel-to-board ribbon connections) rather than a simple stuck pixel or GPU driver quirk. The T-CON is the stage that converts incoming frame data into the timed signals that drive each column and row of the panel, so timing or driver faults commonly show as vertical bands that vary with image content. More on T‑CON and panel drivers. (analogix.com)

A reliable isolation sequence: run the monitor’s built‑in self test (power on with video cable disconnected) and open the monitor OSD/menu. If the vertical lines appear on the No‑Signal screen or inside the OSD, the defect is inside the monitor; if the OSD is clean and lines only appear with the PC input, the source or cable is still suspect. Manufacturer support pages and diagnostics describe this exact test and RMA guidance. . ()

Practical fixes and cautions: intermittent or pressure-sensitive lines sometimes respond to reseating internal panel ribbons or replacing the T‑CON board, but those repairs require opening the case and often approach the cost of a new monitor. If the monitor is under warranty an RMA is the safest route; if not, shop repair quotes but expect replacement to be the more economical option in most consumer displays. Built‑in firmware resets, cleaning vents, and checking for heat/dust are low‑risk preliminary steps. [HP/Dell support pages cover these diagnostics and warranty steps]. ()

Notes on earlier replies: ’s point about dust/heat is reasonable to try before anything invasive, and ’s suggestion to check the video card is valid only until the OSD/self‑test proves the fault lies inside the monitor. The OSD/no‑signal test is the single most decisive check before considering repairs or RMA. (lg.com)

Member Avatar for w4hagen

Hmm, a genral fix would be if you just tried dusting it, it might be a heat issue, otherwise, check if its still undr warranty

Member Avatar for Computer-Crash

I think it might be the video card

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