Hi!
If your Blu-Ray disc drive is not responding at all, as you suggested, you may need to replace it, or at least disassemble the console to check the connections and the ribbon cables themselves between the motherboard and the drive itself. It would be best to take the old drive out completely and to put it back making sure the connections are secure and firm.
If it does not work now, replace the entire drive using thisguide, especially since the tag of your post is "looks like it may have been dropped before"... Disk drives are sensitive to drops since they contain many moving parts, magnets and optical equipment that can break very easily.
Anyway, you will find replacement parts on the iFixit websiteor if you look on AliExpress, eBay and so on.
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