Fix a laser

Hello. I buy my first green laser (SDLaser 301) few days ago. Laser stop working after 5 seconds :/ I remove a upper part. I saw one small think, it wasn't hard to remove. I lost this. I remember, it have a lens on top, and something green, like a small crystal. I can fix it, or I must buy new module?
When I turn on laser, I see this: [Photo]
Sorry for bad english.

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