maybe it just needs a reflow, try having @chungus take a look at it?
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For reflowing, maybe you can try the old oven method. This was very common 15 yrs back when the Nvidia laptop gpus had an issue of getting desoldered with time
I used a hotgun , i think that is as good as reflowing.
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If I was in your place I won’t trust this ssd for any important data anymore. Use it for things like torrents/ storing games if it works again?