Looks like the now infamous drive cable issue to me.

I won't be the one to tell you to void your warranty (that's Tony's job ;), but I'll bet that if you pop the lid you'll find a drive cable dangling.

-Zandr

-Zandr
Mk.I #150
Mk.II #39
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-Zandr
Mk.IIa #010101243 currently getting a 500GB SSD. More spares in the shed.