Question A disk read error occurred

Sep 2, 2021
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I've recently just changed my power supply to a new one, due to the previous one being broken (no power). When I changed it, it booted normally but then a couple of hours in to it suddenly crashed and then went into bios saying "No Bootable Device is detected", I played around with it a couple of minutes and then it now recognizes the hard drive but it shows "A disk read error occured".

Does anyone know how to fix this? Many thanks in advance.