Keyboard and electronic device using same

1. A keyboard for an electronic device, comprising:

a main body comprising a plurality of keys;

a test indicator positioned on an outside surface of the main body, the test indicator comprising an anode and a cathode; and

an interface electrically connected to both the main body and the test indicator; the interface comprising a first idle pin and a second idle pin;

wherein the main body is electrically connected to a main board of the electronic device through the interface, such that the electronic device can be operated using the plurality of keys of the main body, and the anode and the cathode of the test indicator are electrically connected to the main board through the first idle pin and the second idle pin, respectively; when a power supply of the electronic device works normally, the power supply provides a voltage to the first idle pin through the main board, and the test indicator is switched on by the voltage and emits light to indicate that the power supply works normally.

2. The keyboard as claimed in claim 1 , wherein the interface is a Personal System 2(PS/2) interface and further includes a power supply pin, a data pin, a clock pin, and a ground pin; the main body electrically connected to the main board through the power supply pin, the data pin, the clock pin, and the ground pin.

3. The keyboard as claimed in claim 1 , wherein the test indicator is a light emitting diode (LED).

4. The keyboard as claimed in claim 2 , wherein when a hard disk drive (HDD) of the electronic device that is electrically connected to the main board works normally, the main board provides a voltage to the first idle pin, and the test indicator is switched on by the voltage and emits light to indicate that the HDD works normally.

5. An electronic device, comprising:

a main board comprising a power supply; and

a keyboard electrically connected to the main board, the keyboard including a main body, a test indicator, and an interface; wherein the main body comprises a plurality of keys; the test indicator comprises an anode and a cathode, the interface comprises a first idle pin and a second idle pin; the main body is electrically connected to the main board through the interface, such that the electronic device can be operated using the plurality of keys of the main body, and the anode and the cathode of the test indicator are electrically connected to the main board through the first idle pin and the second idle pin, respectively; when the power supply works normally, the power supply provides a voltage to the first idle pin through the main board, and the test indicator is switched on by the voltage and emits light to indicate that the power supply works normally.

6. The electronic device as claimed in claim 5 , wherein the interface is a Personal System 2 (PS/2) interface and further includes a power supply pin, a data pin, a clock pin, a ground pin, a first idle pin, and a second idle pin; the main body electrically connected to the main board through the power supply pin, the data pin, the clock pin, and the ground pin.

7. The electronic device as claimed in claim 5 , wherein the test indicator is a light emitting diode (LED).

8. The electronic device as claimed in claim 6 , wherein the main board further includes a test connecting module, a plurality of resistors, and a plurality of capacitors; the test connecting module including a power supply indicator positive pin and a power supply indicator negative pin, the power supply indicator positive pin electrically connected to the power supply through a first resistor, and also electrically connected to a ground through a first capacitor; the power supply indicator negative pin electrically connected to the power supply through a second resistor, and also electrically connected to a ground through a second capacitor.

9. The electronic device as claimed in claim 8 , wherein the first idle pin and the second idle pin are respectively electrically connected to the power supply indicator positive pin and the power supply indicator positive pin.

10. The electronic device as claimed in claim 8 , wherein the main board further includes a hard disk drive (HDD) indicator positive pin and an HDD indicator negative pin, the HDD indicator positive pin electrically connected to the power supply through a third resistor, and also electrically connected to a ground through a third capacitor.

11. The electronic device as claimed in claim 10 , further comprising an HDD electrically connected to the main board; when the first idle pin and the second idle pin are respectively electrically connected to the HDD indicator positive pin and the HDD indicator positive pin, and the HDD works normally, the main board provides a voltage to the first idle pin, and the test indicator is switched on by the voltage and emits light to indicate that the HDD works normally.

12. The electronic device as claimed in claim 8 , wherein the connecting module further includes a first ground pin and a second ground pin, both the first ground pin and the second ground pin grounded.

13. The electronic device as claimed in claim 8 , wherein the connecting module further includes a power supply activating pin for receiving an activating signal for activating the power supply.

14. The electronic device as claimed in claim 8 , wherein the connecting module further includes a reset pin for receiving a reset signal for resetting the main board.