The invention relates to the technical field of servers, and provides a
decision system and method for a running state of a
server sequential control device. The
system comprises an oscillator, a CPLDchip and a
peripheral indicating circuit of a mainboard. The
peripheral indicating circuit of the mainboard comprises a first
LED lamp. The oscillator is used for providing a
clock signal. The CPLD
chip is used for the
clock signal, and used for performing the frequency division
processing on the
clock signal through a counter, and transmitting the processed signal to the first
LED lamp through an output pin of the CPLD
chip. While the logic of a previous logical bit of the counter is 1, the first
LED lamp is lightened; and while the logic of a latter logical bit is 1, the first LED lamp stops flickering. While the LED lamp is lightened and flickered in a
fixed frequency, it is indicated that the CPLD
chip is normally operated; and while the LED lamp stops the
flicker, it is indicated that the CPLD chip breaks down, so the decision for the running state of the CPLD is realized, and the timeliness of the fault diagnosis is improved.