Using the trouble analysis chart and faults table provided in the illustration, if the gyrocompass was malfunctioning, but no fault codes are present on the display unit, what is most likely the problem if the DC/DC converter LED status indicator is functioning properly, but the CPU LED status indicator is not blinking? EL-0195

Illustration EL-0195: the U.S. Coast Guard has not released this illustration.

Question

Using the trouble analysis chart and faults table provided in the illustration, if the gyrocompass was malfunctioning, but no fault codes are present on the display unit, what is most likely the problem if the DC/DC converter LED status indicator is functioning properly, but the CPU LED status indicator is not blinking? EL-0195

Illustration EL-0195: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option D: The CPU assembly is malfunctioning.. When the DC/DC converter indicator is functional but the CPU status LED fails to blink, the central processing unit has failed to boot or execute its firmware loop. This isolates the fault directly to a malfunctioning CPU assembly requiring replacement or board-level troubleshooting.