Calibrates High, Medium, and Low color temperatures by adjusting the Red, Green, and Blue gain and cut-off offsets.
The Main Board sends a PWR-ON signal back to the SMPS to activate the 12V and 24V rails. lg lj7 chassis service manual
If standby voltage is present, press the power button and monitor the PWR_ON pin. The mainboard should pull this pin high (typically to ~3.3V or 5V) to tell the PSU to wake up the rest of the boards. If this voltage doesn't change, the mainboard microprocessor is faulty. Symptom 2: Flash of Light, Then Black Screen (Audio Works) Calibrates High, Medium, and Low color temperatures by
High-speed LVDS (Low-Voltage Differential Signaling) or V-by-One interface. lg lj7 chassis service manual