HFW 4.86 = OFW 4.86 with only one sprx file from OFW 4.82.
Patched files are not supported in HFW because the entire point of HFW is to be able to install the firmware on a console without jailbreak! All files inside the PUP package must be official versions (OFW).
To sum up patching HFW for noBD is basically pointless:
If your console is CFW compatible you are better off installing a CFW patched for noBD.
And if your console is not CFW compatible, there is nothing you can do as you cannot install a patched firmware, at least not with currently available tools.
If I were you, I would try to repair the BD drive anyway.
Try reading both a CD/DVD & a BD disc, if the CD reads OK but the BD doesn't, the issue is most likely caused by a defective lens. Those are not very expensive & not too hard to replace. You can buy them from some websites & places like ebay. Another option is to buy a dead console (same model of course) for 10 bucks or so & extract the lens from the BD drive, keep the rest of the dead console for parts you may need later at some point.
Use psdevwiki.com for hardware info.
https://www.psdevwiki.com/ps3/BD-460
https://www.psdevwiki.com/ps3/KES-460A