Hi everyone,

I am facing a frustrating intermittent display issue with my monitor and need some advice on what might be causing it and how to fix it.

• Monitor Model: Samsung LF22T350F
• GPU/Processor: Intel(R) UHD Graphics 630 (No dedicated GPU)
• Connection: HDMI

The Issue:

When I first turn on the PC and monitor in the morning or after a long break, the display works perfectly fine with zero issues. However, after using it continuously for a few hours (usually by evening or night), vertical white and translucent bands appear at the bottom-middle section of the screen.

(I have attached a video of the issue for reference).

What I have tested so far:

1. If I turn off the monitor and let it rest for about 15–20 minutes—while keeping the PC completely running—the lines completely disappear or reduce significantly when I turn the monitor back on.
2. Changing graphics settings or power modes on my PC doesn't affect the lines.

My Questions:

1. Has anyone faced a similar issue where lines only appear after a certain period of continuous usage? Is it a failing T-Con board, a loose internal ribbon/COF cable, or is the LCD panel itself dying?
2. Is this safely repairable by a technician, or will the display eventually become permanently broken?
3. Since this issue does not appear instantly and only happens after 3-4 hours of continuous use, how can I prove this to the official service center so they don't reject my claim as "No issue found"?

Any help, insights, or experiences with this specific Samsung model would be highly appreciated. Thanks in advance!

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