You can contact Sony and they can help you possibly fix the issue by sending it to them. Especially if you just bought it recently. You could also try and fix it yourself by taking it apart and dusting the inside. Buy the duster can spray and spray it clean. So much dust collects in gaming systems and could be a good reason it won't read your disc.
they don't take broken systems
They will not trade broken consoles
They won't give you full price they'll give you a store credit to put towards in exchange. But I'm not sure for PS3
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