Integrated circuit board and display apparatus

An integrated circuit board, comprising at least one frontend data processing chip, at least one backend data processing chip, at least one external connection interface connected to the at least one frontend data processing chip, and at least one internal interface connected to the at least one backend data processing chip,

• wherein the integrated circuit board further comprises at least one switching component, wherein the at least one internal interface, which is connected to a backend data processing chip, is further connected to at least one frontend data processing chip or to another backend data processing chip via the at least one switching component;
• in a case in which the backend data processing chip is in a normal operation, the backend data processing chip is configured to communicate with the at least one frontend data processing chip or with the another backend data processing chip via the internal interface to which the backend data processing chip is connected and the switching component;
• and
• in a case in which the backend data processing chip needs to be tested, the backend data processing chip to be tested is configured to receive a test signal from an external test circuit via the internal interface to which the backend data processing chip to be tested is connected, wherein the internal interface being plugged into the external test circuit to receive the test signal, and the switching component is configured to interrupt a communication connection between the backend data processing chip to be tested and the frontend data processing chip or that between the backend data processing chip to be tested and the another backend data processing chip;
• wherein the at least one external connection interface is a high definition multimedia interface HDMI, and the switching component is a transistor;
• a source of the transistor is configured to receive a signal subjected to the processing of the frontend data processing chip in a normal operation, a gate of the transistor is connected to a hot plug detect signal HTPDN pin of the HDMI, and a drain of the transistor is connected to the internal interfaces connected to the backend data processing chip to be tested.