Usually, there are 2 cables (power and data) and the data cable has 2 ends to check. That's three. You only mention one thing you took out and in again.
Kees
I cleaned my computer today from dust, and when I plug the cables and everything back on and turn the computer on then the hard drive (D) is gone.. ? what happend... I also tried to take the cable out and in from the hard drive
thanks in advance for the help!

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