The KSZ80_0B_S4LV0.2 acts as the bridge between the TV's main logic board and the LCD panel, managing the timing and voltage required for pixel display.
Sony Kdl-40r450a Video Logic Board Ksz80 OB S4lv0. 2 for sale online | eBay. Placa V-com Tv Sony Kdl40r485a Ksz80-ob-s4lv0.2 Ksz80 Ob S4lv0.2 Datasheet
You can find these boards at specialized retailers such as Great Bharat Spares or Harry Electronics . Sony Kdl-40r450a Video Logic Board Ksz80 OB S4lv0.2 - eBay The KSZ80_0B_S4LV0
For technicians looking to repair a "No Display" or "Blank Screen" issue where the backlight is functional, checking specific test points on the board is essential. 12V. Logic Voltage: 3.3V. Placa V-com Tv Sony Kdl40r485a Ksz80-ob-s4lv0
Often caused by an internal short in the gate signals (CKV lines) within the glass panel, which triggers the DC-DC converter on the scaler board into protection mode.