|Tell us the make and model of your brand name system, or if you have a generic desktop system, the make and model, or at least the model, of your mboard. |
The model of a brand name system is usually on a label on the outside of the case,
or if it's a Dell system, go here to find your Service tag number, tell us what it is:
The model of a mboard in a a generic desktop system is usually printed in obvious larger characters on the surface of the mboard, often between the slots, or near the center of the mboard.
Some computers show a screen with the model number on it while booting the computer.
If this is a desktop computer......
Check your SATA data cables. The connector on each end should "latch" into the socket on the drive and on the mboard, or on the drive controller card - it should not move when you merely brush your hand against it near the socket - if it does, mere vibration can cause a poor connection of it - use another SATA data cable that does "latch", or tape the connector in place.
(There is a slight projection or bump on one side of the outside of the connector that "latches" it into the socket - it's easily broken off or damaged)
The same thing applies for the SATA power connection.