Can broken hinge/crackced hinge be fixed on laptops?

Generally not worth the trouble. It's probably worth maybe $100 or $200, even when it's working fine, and the labor to fix the hinge would cost at least that much, if not more. Thus, not worth the trouble.

You may be able to glue/mount it in the kitchen or near your desk as a normal "desktop" workstation, but its life as a "portable" is pretty much over.

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