Display apparatus and error detection method thereof

A computer system comprising:

• a computer main body having:
• a power controller which supplies electric power to components of the computer system, and
• a data processing unit having a central processing unit and a video card;
• and
• a display apparatus having:
• a first video processing part which processes a video signal output from the video card and displays a picture thereof,
• a picture data storing part, and
• an error detecting part which captures the video signal at predetermined intervals, stores picture data of the video signal in the picture data storing part, compares the stored picture data to each other after elapse of a set time, and outputs an error signal to the computer main body in response to the stored picture data being equal to each other, wherein the computer main body cuts off the electric power supplied to at least one component in response to the error signal output from the error detecting part of the display apparatus.

An error detection method of a display apparatus having a first video signal processing part which processes a video signal output from a video card provided in a computer main body and displays a picture thereof, the method comprising:

• capturing the video signal at predetermined intervals;
• storing picture data of the video signal;
• comparing the stored picture data to each other after elapse of a set time after a time of the storing;
• and
• outputting an error signal to the computer main body in response to the compared picture data being equal to each other.

A computer readable medium with operating instructions for implementing a method of detecting an error in a display apparatus which processes a video signal output from a video card provided in a computer main body, performed by a computer, the method comprising:

• capturing the video signal at predetermined intervals;
• storing picture data of the video signal over time;
• comparing the stored picture data to each other after an elapse of a set time after a storing time;
• and
• outputting an error signal to the computer main body in response to the compared picture data being equal to each other.

The computer readable medium according to claim 33, wherein the outputting of the error signal comprises:

• outputting a POR (power-off request) signal to the computer main body in response to the compared picture data being equal to each other;
• capturing and storing the picture data of the video signal at the predetermined intervals after the outputting of the POR signal;
• and
• comparing the picture data stored before the outputting the POR signal with the picture data stored after the outputting the POR signal.