Display device and method of checking input signals

A method of checking a signal input into a display device, the method comprising:

• receiving the input signal and identifying a type of the input signal that is received;
• checking whether the identified input signal is abnormal;
• and
• switching from the checked input signal to a next input signal to be checked so that whether the next input signal is abnormal is checked, after the input signal is checked and found to be abnormal.

A display device comprising:

• a signal identifying unit receiving an input signal and identifying the type of received input signal;
• a signal checking unit checking whether the identified input signal is abnormal;
• and
• a signal changing unit switching from the checked input signal to check a next input signal so that the signal checking unit checks whether the next input signal is abnormal.

A method of checking a signal input into a display device, the method comprising:

• receiving an input signal and identifying the type of received input signal;
• checking whether the received and identified input signal is abnormal;
• and
• switching from the checked input signal to a next received and identified input signal to check whether the next received and identified input signal is abnormal.