Loose Macbook Pro Screen Hinge

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Hi all. Just received a used Macbook Pro 2009 Unibody from my boss as a thank you present and my screen seems to be loose at the hinge. It will open and close way too easily. Does anyone know how to go about tightening it? Any help would be greatly appreciated.

Model: MB990LL/A

Link to specs: MacBook Pro "Core 2 Duo" 2.26 13" (SD/FW) Specs (Mid-2009 13", MB990LL/A, MacBookPro5,5, A1278, 2326*) @ EveryMac.com