Sotsugyou: Graduation/Hidden content

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Sound test

When the NEC Avenue logo appears at startup, press ↑ ← ↓ → ↑ ← ↓ →  SELECT   SELECT   SELECT  ←. To use the sound test, press ↑ and ↓ to select a song and Ⅰ to play the selected song. To exit, reset the system.

Visual test

When the NEC Avenue logo appears at startup, press ↑ → ↓ ← ↑ → ↓ ←  SELECT   SELECT   SELECT  ←. This screen also displays a build date.