Virtual load board and test system and test method for liquid crystal display control board

A test system for a liquid crystal display control board, wherein the test system comprises a virtual load board, the virtual load board adapted to connect to a liquid crystal display control board in order to monitor operation condition of the liquid crystal display control board with an indication unit, wherein the virtual load board comprises a connection port, a conversion circuit, and the indication unit, the connection port comprising at least one terminal, the terminal receiving an output voltage from the liquid crystal display control board, the conversion circuit connected to a reference voltage and receiving and converting the output voltage into an operating voltage for the indication unit and supplying the operating voltage to the indication unit;

• wherein the conversion circuit comprises a first resistor component and a second resistor component connected in series between the terminal and the reference voltage and the indication unit has a first end directly connected to a node point between the first and second resistor components and a second end connected directly to the terminal or the reference voltage and is connected in parallel with the first resistor component or the second resistor component, which defines a division voltage that is supplied to the indication unit, whereby the indication unit is activated when the division voltage corresponds to the operating voltage of the indication unit.

A test method for a liquid crystal display control board, wherein the test method comprises the following steps:

• receiving an output voltage from a liquid crystal display control board;
• operating a conversion circuit that is connected to a reference voltage and receives the output voltage for converting the output voltage into an operating voltage for an indication unit and supplying the operating voltage to the indication unit, wherein the conversion circuit comprises a first resistor component and a second resistor component connected in series between the terminal and the reference voltage and the indication unit has a first end directly connected to a node point between the first and second resistor components and a second end connected directly to the terminal or the reference voltage and is connected in parallel with the first resistor component or the second resistor component, which defines a division voltage that is supplied to the indication unit, whereby the indication unit is activated when the division voltage corresponds to the operating voltage of the indication unit;
• and
• monitoring an operation condition of the liquid crystal display control board with the indication unit.