Abstract: A method for recording managing SELs of a server includes the following steps. Periodically determining a current number of the SELs stored in a storage unit of the server. Comparing the current number with a historical number to determine newly generated SELs. If the current number is greater than the historical number, determining whether the storage unit is full. If the storage unit is full, controlling the BMC to transfer the newly generated SELs to a cache unit. The stored SELs are erased in the storage unit. Transferring the SELs in the cache unit to the storage unit when the SELs in the storage unit are erased. The historical number is updated.

Abstract: A computer wake up circuit, for awaking a computer which is in a sleep state via a computer serial port, includes an AT89 series microcontroller, a switching circuit, an input circuit. The switching circuit is coupled to the pins P3.2 (INT0) and P3.7 of the AT89 series microcontroller, for triggering the AT89 series microcontroller to output an control signal. The input circuit comprises a first resistance, a control switch, a second resistance, and a third resistance. One end of the first resistance is coupled to pin P3.1 (TXD) of the AT89 series microcontroller, the other end of the first resistance is coupled to an input end of the control switch. An output end of the control switch is coupled to the second pin of the computer serial port via the second resistance, and is coupled to the third pin of the computer serial port via the third resistance.

Abstract: A cable connector includes four first male connectors of a first type, a second male connector of a second type, and four third male connectors of the first type. The first male connectors compose a first input/output terminal. The second male connector and the four third male connectors compose a second input/output terminal. Each first male connector is electrically connected to the second male connector and a corresponding third male connector.

Abstract: An electronic device includes a processor, a first storage unit, and a second storage unit. The first storage unit stores data generated by the processor in real time. The processor checks amount of storage space in use of the first storage unit, compares the current amount of used storage space of the first storage unit checked this time with a previous amount of used storage space of the first storage unit checked previously to determine whether the current amount of used storage space is greater than the previous amount of used storage space, obtains data that was stored in the storage space of the first storage unit since the previous check if the current used storage space is greater than the previously used storage space, and stores the obtained data in the second storage unit after the data is obtained.

Abstract: An electronic device includes an internal storage module, a baseboard management controller (BMC) and a port. The internal storage module stores a first firmware and a boot application. The port connects to an external storage for storing a second firmware which is a backup of the first firmware. After the electronic device is powered on, the BMC runs the boot application to load the first firmware from the internal storage module. If the first firmware fails to load, the BMC copies the second firmware from the external storage to the internal storage module to replace the first firmware.

Abstract: A testing device for testing a board managing controller (BMC) of a computer motherboard including a power supply, a BMC, and a warning unit, includes a storing module, a voltage adjusting module, and a voltage displaying module. The storing module stores a preset warning voltage and an upper limit voltage larger than the preset warning voltage. The voltage adjusting module is used for adjusting the voltage of the power supply. The voltage displaying module is used for displaying the output voltage of the voltage adjusting module. It indicates the BMC works properly if the warning unit provides warning when the output voltage of the voltage adjusting module is less than the preset warning voltage, or the warning unit is silent when the output voltage of the voltage adjusting module falls between the preset warning voltage and the upper limit voltage.

Abstract: A cable connector includes four first male connectors of a first type, a second male connector of a second type, and four third male connectors of the first type. The first male connectors compose a first input/output terminal The second male connector and the four third male connectors compose a second input/output terminal Each first male connector is electrically connected to the second male connector and a corresponding third male connector.

Abstract: A computer wake up circuit, for awaking a computer which is in a sleep state via a computer serial port, includes an AT89 series microcontroller, a switching circuit, an input circuit. The switching circuit is coupled to the pins P3.2 (INT0) and P3.7 of the AT89 series microcontroller, for triggering the AT89 series microcontroller to output an control signal. The input circuit comprises a first resistance, a control switch, a second resistance, and a third resistance. One end of the first resistance is coupled to pin P3.1 (TXD) of the AT89 series microcontroller, the other end of the first resistance is coupled to an input end of the control switch. An output end of the control switch is coupled to the second pin of the computer serial port via the second resistance, and is coupled to the third pin of the computer serial port via the third resistance.

Abstract: A method controls a computing device to perform a power cycle test by switching a power supply on or off using a power cycle test apparatus. The apparatus includes a timer, a counter, a power rectifier, and a display unit. The timer sets a test period of the power cycle test, controls the power rectifier to switch the power supply on, counts a test time of the power cycle test at the begin time of the test period, and controls the power rectifier to switch the power supply off when the test period elapses. The power rectifier transforms AC supplied by the power supply into DC when the power supply is switched on, provides the AC to the computing device to perform a power-on test process, and controls the computing device to perform a power-off test process when the power supply is switched off.

Abstract: A computer mouse includes a connector, a mouse circuit, a sound box, an audio circuit, and a hub. The audio circuit is connected to the sound box. The hub is connected to the connector through a cable, and connected to the mouse circuit and the audio circuit. The audio circuit receives audio signals from the connector through the hub, and outputs the received audio signals through the sound box.

Abstract: A testing device for testing a board managing controller (BMC) of a computer motherboard including a power supply, a BMC, and a warning unit, includes a storing module, a voltage adjusting module, and a voltage displaying module. The storing module stores a preset warning voltage and an upper limit voltage larger than the preset warning voltage. The voltage adjusting module is used for adjusting the voltage of the power supply. The voltage displaying module is used for displaying the output voltage of the voltage adjusting module. It indicates the BMC works properly if the warning unit provides warning when the output voltage of the voltage adjusting module is less than the preset warning voltage, or the warning unit is silent when the output voltage of the voltage adjusting module falls between the preset warning voltage and the upper limit voltage.