Apply power to the unit. The will blink rapidly in amber, indicating the unit is in "Learning Mode."

Connect a certified calibration source to Analog Input Channel 1. Inject a baseline signal of exactly 4.00 mA.

The is a highly popular, Chinese-manufactured "three-in-one" main board widely used across many budget-to-midrange 4K Ultra HD and LED televisions. Combining the core logic processing unit, the power supply unit (PSU), and the LED backlight driver circuit onto a single physical printed circuit board (PCB) layout, this chassis design maximizes production cost-efficiency but demands precise troubleshooting when failure occurs.

Follow these precise sequential steps to gain access to the internal components without compromising the structural integrity or IP54 seal of the device housing. Required Tools Torx T6 screwdriver Precision Phillips #00 screwdriver Plastic spudger / nylon prying tool Tweezers (anti-static) Step-by-Step Disassembly