Lighting Repair Knowledge Hub logoLighting Repair HubLIGHTING REPAIR KNOWLEDGEFind a Fault
Home/Repair/TV Backlighting
TV Backlighting · Color fault

TV Sync Backlight Colors Reversed Left to Right

A step-by-step troubleshooting guide that checks power, wiring, settings, and the affected component before parts are replaced.

DifficultyEasyTime10–30 minSteps6
FAULT OVERVIEW

Understand the symptom before replacing parts

A step-by-step troubleshooting guide that checks power, wiring, settings, and the affected component before parts are replaced.

TV Sync Backlight Colors Reversed Left to Right — complete English tutorial infographic
English tutorial overview Complete English infographic with the six diagnostic or repair steps shown below.
TOOLS

Prepare before testing

  • Phone
  • Suitable inspection tool
  • Suitable inspection tool
!Safety note

Use the product label and wiring diagram as the final authority.

COMMON CAUSES

Check these areas first

  • Power or voltage mismatch
  • Loose, reversed, or damaged connection
  • Controller, driver, or component failure
  • Incorrect setting or incompatible device
STEP BY STEP

Diagnostic procedure

Follow the sequence and change only one condition at a time.

01

Build the shortest working signal chain

Connect one source, one known-good HDMI cable, the sync device, and the TV.

TV Sync Backlight Colors Reversed Left to Right — step 1: Build the shortest working signal chain
Step 01: Build the shortest working signal chain — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
02

Confirm the input and output ports

Check that the source is connected to an input and the television to the correct output.

TV Sync Backlight Colors Reversed Left to Right — step 2: Confirm the input and output ports
Step 02: Confirm the input and output ports — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
03

Reduce the video format temporarily

Test 1080p SDR or a lower refresh rate to identify bandwidth, HDR, or HDCP compatibility problems.

TV Sync Backlight Colors Reversed Left to Right — step 3: Reduce the video format temporarily
Step 03: Reduce the video format temporarily — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
04

Recalibrate the screen boundaries or strip direction

Set the correct starting corner, clockwise direction, camera frame, and screen zones.

TV Sync Backlight Colors Reversed Left to Right — step 4: Recalibrate the screen boundaries or strip direction
Step 04: Recalibrate the screen boundaries or strip direction — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
05

Update firmware and app settings

Install current firmware and review color order, latency, and image-processing options.

TV Sync Backlight Colors Reversed Left to Right — step 5: Update firmware and app settings
Step 05: Update firmware and app settings — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
06

Restore features one at a time

Re-enable 4K, HDR, high refresh rate, or advanced color modes individually and retest.

TV Sync Backlight Colors Reversed Left to Right — step 6: Restore features one at a time
Step 06: Restore features one at a time — Cropped directly from this tutorial’s English main infographic.
What to observeRecord the reading or behavior before changing the next variable.
Expected result

The fault is isolated to a power source, connection, setting, controller, driver, or light section.

If the fault remains

Stop if there is overheating, odor, damaged insulation, repeated fuse failure, or exposed mains voltage.