Host system and method for unlocking electronic lock

A method for unlocking an electronic lock of a host system, comprising:

• when a system circuit board of the host system is not activated, determining whether the system circuit board has received a trigger voltage;
• when the system circuit board is not activated and the trigger voltage is received, detecting, via a control chip of the system circuit board, an input sequence in which a plurality of universal serial bus ports is being inserted by a universal serial bus device;
• comparing the input sequence with a predetermined sequence by the control chip;
• and
• when the input sequence is equal to the predetermined sequence, outputting an unlock signal from the control chip to the electronic lock so as to unlock the electronic lock.

A host system, comprising:

• a chassis, having a side door;
• an electronic lock, arranged on the side door for locking the side door on the chassis;
• and
• a system circuit board, disposed within the chassis and coupled to the electronic lock, the system circuit board having a plurality of universal serial bus ports, wherein when the system circuit board is not activated and receives a trigger voltage, the system circuit board detects an input sequence in which the universal serial bus ports are being inserted by an external electric device, and when the input sequence is equal to a predetermined sequence, the system circuit board outputs an unlock signal to the electronic lock so as to unlock the electronic lock.