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I'm having a bizarre problem, and it seems I'm not alone.

On a Dell Latitude 13, I get the error message "internal hard disk drive not found" during POST.

Yet, if I take the very same hard drive and connect it via a USB drive dock, it boots just fine.

There were clear (now apparently unrelated) problems with the motherboard on this laptop, so I have replaced it. I have also replaced the SATA controller daughterboard.

It seems there are others facing this issue, but I don't see a solution. In fact I'm having trouble even understanding what the problem is.

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So what is your question? It sounds like the SATA controller on the board is faulty and you replaced it. That should do the trick. –  Synetech Feb 5 '12 at 23:00
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Run the Dell diagnostics. Usually pressing F12 durning boot will allow you to run this. Thjis would identify the problem component

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We did this. It shows no problems. –  jMyles Feb 6 '12 at 20:13
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