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In general, if the POS detects a system board failure (a critical error), the Digital
Video Recorder halts and sends out a series of beeps. If failure is detected in an
area other than the system board (such as the display, keyboard or mouse) an
error message is displayed on the screen and testing is stopped. It is important to
remember that the POST does not test all areas of the Digital Video Recorder,
only those that allow it to be operational enough to run diagnostic programs.
If your system does not successfully complete the POST, but displays a blank
screen, emits a series of beeps, or displays an error code, consult your dealer.