Question:

How can I fix backlight flickering on my Y21 Neo QLED TV?

Answer:

Affected Models

Y21 Neo QLED (MiniLED)

Symptom

Backlight flickeirng or part of the screen is shaking

Background/Cause

In the miniLED models, the number of LEDs is high and it is controlled by each block. The higher the number of LEDs, the more data needs to be transmitted, and it should be driven according to each sync.

If the timing is intermittently incorrect or the sync is incorrect under certain conditions, the Backlight may partially/fully tremble. We can solve the issue when the problem occurs, but Y21 models can only be updated via USB.

Solution

If you're experiencing backlight flickering or shaking on your Y21 Neo QLED TV, follow these steps to resolve the issue:

Check affected models: This issue affects Y21 Neo QLED TVs (MiniLED).

Identify symptom: Look out for backlight flickering or part of the screen shaking.

Understand cause: In MiniLED models, multiple LEDs are controlled by individual blocks. As more LEDs require more data transmission, an incorrect timing or sync may lead to partial/full backlight trembling.

Apply solution: Update the Local Dimming (LD) firmware to the latest version using a USB drive to prevent future screen flickering. Refer to the attached model list for the correct LD FW version. After updating, confirm with the customer that they have the correct version installed.

Upgrade Guide

1. Download LD FW file from SKP
2. Create "LD" folder in the Root folder of a USB stick
3. Copy the LD FW file into the "LD" folder and plug the USB stick into the TV port
4. On the TV: Factory Menu -> SVC -> Upgrade -> LD MCU upgrade
5. Note: The update will not run unless you access the LD MCU upgrade menu and have the USB stick plugged in.

Affected Models: Y21 Neo QLED (MiniLED) - These are the specific television models that have the backlight flickering issue.

Symptom: Backlight flickering or part of the screen shaking - This refers to the visual display problem experienced on the TV screen.

Background/Cause: Incorrect timing or sync - This means that there might be issues with how the TV processes and displays its visuals, leading to the observed flickering.

Solution: Update the LD (Local dimming) Firmware - Updating the firmware helps improve the TV's performance and prevents further instances of screen flickering.