Sometimes it happens that for some unknown reason the computer ceases to correctly identify the hard disk, or a successful boot suddenly starts? Hang ?, and then did not boot.
Do not rush to carry it to the service or to view ads from hard drives and motherboards.
It may be necessary to replace a loop.
Turning off the power from the system unit and remove the side cover.
Carefully inspect the motherboard and allwires and cables that are connected to both the system board and all devices connected to it. Flat cable to the motherboard often connected:
? Floppy diskovody-
? Hard disks-
? CD drives, disks and dvd- other formats.
In doing so, the floppy drive is a separate train. If you have a computer, released a more than 5 years ago, most likely, hard drives and disk drives are connected to each other IDE cable. Externally it is a 40 or 80-wire cable with three connectors. The first connector, it connects to the motherboard, the other two are connected to the storage media: hard disk drives or optical drives. Typically, a computer using two IDE cable.
To replace the ribbon cable, gently remove itconnectors from the jack drives and hard drives, to which it is connected. To facilitate access to them, it may be worthwhile to disconnect and wires, providing power to the unit. Then, holding the motherboard and not allowing her inflection, disconnect the ribbon cable from the IDE socket. If necessary, also detach the second IDE cable.
New loops set in reverse order: first gently, gently pressing, anchoring them on the motherboard, then? are connected to the jacks on hard drives and optical drives.