Testing Mattel Aquarius, 1983. Will it work?

I got this box more than a year ago and never tried to turn the computer on. The condition was unknown Music tracks: Twilight by NoCopyrightAudioplus Adventure Ahead by NoCopyrightAudioplus Serene Bell Video Music by MusicViktor11 Ambient Cinematic Documentary by The_Mountain Calming Guitar Corporate (Medium Version) by BoDleasons Slow burner - Ambient by SamuelFrancisJohnson #vintagecomputer #retrogaming #nostalgia #aquarius #80smemories