Abstract: A portable electronic device includes a main body and a protector. The main body includes a first surface and a second surface opposite to the first surface, and two sidewalls opposite to each other. Each sidewall defines a slide groove therein. The protector includes a sheet having two opposite sidewalls, and two slide tabs oppositely arranged on the two opposite sidewalls of the sheet. Each slide tab forms a slide post thereon. The slide posts engages in the slide grooves to allow the protector sliding along the slide grooves and pivoting around the slide posts to respectively cover the first surface or the second surface of the main body.

Abstract: A keyboard for an electronic device includes a main body, a connection state indicator positioned on an outside surface of the main body, and a keyboard port. Both the main body and the connection state indicator are electrically connected to a network host of an electronic device through the keyboard port. The electronic device can be operated using the keyboard and the connection state indicator indicates a connection state between the network host and a local area network.

Abstract: A testing method implemented by a testing system connected to an device includes generating a power on control signal according to preset test parameters and sending to the single chip; controlling a relay to power on the device according to the power on control signal; testing whether the device is successfully powered on; testing whether information of the device is successfully read out during the powering on of the device; testing whether the device is successfully powering off when the device is successfully powered on and the information is successfully read out, ending testing when the device is not successfully powered on and/or the information is not successfully read out, and recording a test result. A testing system is also provided.

Abstract: A temperature control system includes a plurality of temperature sensors, a main controller, a plurality of power supply controllers, and a plurality of cooling devices. The temperature sensors measure current temperature of different monitored areas. The main controller compares the current temperature of the monitored areas with a predetermined temperature stored in the main controller. The power supply controller is selectably turned on or off according to the comparison to activate or deactivate the corresponding cooling devices under the control of the power supply controller.