COP-USA DVRPRO04 - Manual (Page 124)

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Appendix E
message appears on your display screen. A memory test message ap-
pears next; as the test continues, memory size increases until all installed
memory is tested.
Two classifications of malfunctions can be detected during the POST:
• Error messages that indicate a failure with the hardware, the
software, or the Basic Input/Output System (BIOS). These
critical malfunctions prevent the Digital Video Recorder from
operating at all or could cause incorrect and apparent results. An
example of a critical error is CPU malfunction.
• Messages that furnish important information on the power-on
and boot processes (such as memory status). These non-critical
malfunctions are those that cause incorrect results that may not be
readily apparent. An example of a non-critical error would be a
memory chip failure.
In general, if the POST 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, key-
board 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, but 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 immediately.