Abstract: An electronic device includes a bottom wall, a board perpendicularly connected to the bottom wall, a fan, and a frame receiving the fan. The board defines a vent and two notches above the vent. Each notch extends through a top side of the board. A power connector is mounted to the bottom wall, adjacent to the vent. A switch is mounted to a side of the frame and is electrically connected to the fan. Two fixing members are mounted to the frame to engage in the notches in a vertical direction, therefore, the switch is electrically connected to the power connector.

Abstract: A server includes an enclosure, a motherboard, and first and second switches. The enclosure includes a base and a cover. The first switch is used to manually turn on or off the motherboard. The second switch is capable of turning off the motherboard and is mounted on a sidewall of the base. A stopping piece extends down from one side of the cover to abut against the second switch. The second switch is connected to a power-on pin of the motherboard. When the cover is not covering the base, the stopping piece fails to abut against the second switch. And the second switch is turned off. The power-on pin receives a power-off signal to power off the server.

Abstract: A server includes an enclosure, a motherboard, and first and second switches. The enclosure includes a base and a cover. The first switch is used to manually turn on or off the motherboard. The second switch is capable of turning off the motherboard and is mounted on a sidewall of the base. A stopping piece extends down from one side of the cover to abut against the second switch. The second switch is connected to a power-on pin of the motherboard. When the cover is not covering the base, the stopping piece fails to abut against the second switch. And the second switch is turned off. The power-on pin receives a power-off signal to power off the server.

Abstract: A fan cover includes a base plate, a frame, and a number of ribs. The frame is made of a number of ring-shaped portions with different diameters and concentrically arranged. A number of strip-shaped portions are radially formed among the ring-shaped portions to connect the ring-shaped portions together. The ribs connect the frame to the base plate at an angle. A number of ventilation holes are defined in the frame.

Abstract: A test device is used for testing stability of products. The test device includes a holder, a motor mounted on the holder and a supporting board mounted on the motor. The supporting board includes a supporting surface for supporting the products being tested. The supporting board connects to the motor. The motor drives the supporting board to rotate.

Abstract: A housing of an electronic device includes a sidewall and a heat dissipating zone on the sidewall. The heat dissipating zone includes a reinforcement portion on the sidewall. The reinforcement portion defines heat dissipating holes. The reinforcement portion can extend inwardly from the sidewall of the housing or outwardly from the sidewall of the housing. Each heat dissipating hole has a width equal to or less than 3.5 millimeters.

Abstract: A housing for an electronic device includes a main body and a ventilated member fixed on the main body. The main body includes a heat dissipating zone. The heat dissipating defines a plurality of heat dissipating holes. The ventilated member defines a heat dissipating chamber communicating with the heat dissipating hole therein and a ventilated hole for introducing airflow into the heat dissipating chamber. The ventilated member forms a covering portion covering the heat dissipating holes.

Abstract: A mechanical strength tester includes a steel ball and a hollow cylinder including a supporting configuration. The diameter of the steel ball is less than the diameter of the cylinder. The supporting configuration is operable to support the steel ball on the top of the cylinder and release the steel ball to fall down in the cylinder under force of gravity.