Disfonctionnement mac mini et TV Sharp

Bonjour,
J'ai acheté un mac mini que j'ai connecté à ma TV sharp. Au premier branchement, j'ai obtenu l'écran d'accueil du mac mini mais après quelques minutes d'utilisation, plus rien.
Ma TV ne trouve plus le signal du mac mini.
Pourriez-vous m'aider à comprendre ?
Merci

Bonjour,
Est-ce que la télé avez des paramètres de la source d'entrée sur elle?
Est-il compatible HDMI, DVI ou VGA?
Safe Boot de la HD (touche Maj tenue down au démarrage), est-ce que montrera un écran?

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