Electronic device, and method of controlling the electronic device

An electronic device comprising:

• an external-memory-medium installing portion in which an external memory medium that can store contents data;
• a display portion configured to be operable to display the contents data stored in the external memory medium;
• a sound generating portion configured to generate a sound;
• a power-shut-down-requirement receiving portion configured to receive a requirement for shutting-down a power supply to the electronic device;
• a contents-data-display commanding portion configured to command the display portion to display the contents data stored in the external memory medium;
• a monitoring portion configured to determine whether the external memory medium is installed in the external-memory-medium installing portion, while the contents data are displayed by the display portion;
• a first sound-generation commanding portion configured to command the sound generating portion to generate an alarming sound when the monitoring portion has determined that the external memory medium is not installed in the external-memory-medium installing portion while the contents data are displayed by the display portion;
• and
• a power supply control portion configured to inhibit an operation to shut down the power supply to the electronic device when the power-shut-down-requirement receiving portion has received said requirement for shutting down the power supply while the contents data are displayed by the display portion.