LG 49UJ6500-UB Blue Purple Tint

This 2 year old TV had a blue and purple tint and the backlights were suspected of turning blue. Removing the panel confirmed this colour change happened. Shopjimmy only shows one set of backlights for this model but they didn’t match what was in my tv. Shopjimmy part is 3 rows of left and right strips with 9 LEDs per row and labelled 49UJ65 for panel HC490DGG-ABSR2. My TV has a LC490DGG panel and strips are marked V17 ART3 and there are two rows of 12 LEDs per row.

List of models that use the same style of LED.

  • Hisense 55H5C (strips SVH550AH9 or SVH550AC3) also 55H6B, Insignia NS-55D510NA17 Sharp LC-55LB481U LC-55LB481C
  • LG 43UH6100 43UH610A 43UJ6300-UA (3 rows of long strips)
  • Philips 43PFL4902/F7
  • Sony XBR-49X700D XBR-55X810C KD-60X690E XBR-65X810C
  • Toshiba 50L711U18 55L711U18
  • Vizio D58U-D3 E65U-D3 D650i-B2

Update: I popped off the lens to investigate and it appears these LEDs are naturally blue but are covered in a yellow filter. The yellow filter has cracked and crumbled away.

Blue LED Closeup (Lens Removed)
Intact Filter But Starting to Crack (Lens Removed)
Comparison of Larger Older Style Module That Doesn’t Turn Blue 3mm vs 1mm square (Lens Removed)

Update – Looks like this problem is also affecting LED street lighting.

Why are street lights turning purple? News 40 investigates – News 40 | WNKY Television

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