Abstract: A test-used PCB having an in-series circuit involved with a join test action group (JTAG) signal is provided. A first JTAG connection interface and a second JTAG connection interface are configured on test circuit boards. Test circuit boards can be seriously connected with each other through the first JTAG connection interface and the second JTAG connection interface. Therefore, the efficiency of providing series test circuit boards, reducing TAP controller and JTAG port may be achieved.

Abstract: Disclosed herein is a BIOS (basic input/output system) maintenance method. After a server is powered on, the validity of a first BIOS setting stored in a first memory of the server is determined. If the first BIOS setting is invalid, a BIOS of the server loads a BIOS setting default. The validity of a second BIOS setting stored in a baseboard management control module of the server is also determined. If the second BIOS setting is valid, it is stored into the first memory.

Abstract: A servo device and a method of sharing a basic input/output system (BIOS) include a plurality of mainboards, a circuit board, and a memory unit, and a switching unit disposed on the circuit board. A single memory unit stores a plurality of BIOS entity program segments respectively corresponding to a mainboard model, and transmits the BIOS entity program segments corresponding to the model of the mainboard for receiving the BIOS to the mainboard through the switching unit, so that the mainboards of various models may share the BIOS.

Abstract: A cover and a packing box structure using the same are described. The packing box structure includes one packing container and two covers. The packing container is formed by folding a folding board, and two opposite ends of the folding board overlap each other to form an accommodation space. The two covers are respectively covered on the top and the bottom of the packing container. Further, each cover is of a three-dimensional structure formed through engagement and having an opening on a single side, such that the packing container and the covers can be easily detached/assembled.