I came home and my harddrive wasn't on. The light was off. When I plug the AC adaptor into the wall its light turns on but when flip the on switch on for the harddrive it flashes and turns both lights off.
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Scroll down to the second photo, and left-click on it. The case of the external harddrive is shown open. Inside is a 2.5 inch laptop sized harddrive. An aluminum tape strip covers the small circuit board, attached at the back of the harddrive.
The second photo down on this page, shows you the small interface circuit board, that the harddrive plugs into, with the aluminum tape removed.
(Another design has wires coming from the small circuit board, to an interface the harddrive plugs into )
It is this small circuit board that goes bad in a LaCie. QUITE common.
Simple. 1) Obtain a 3.5 inch IDE external enclosure 2) Remove the 3.5 IDE harddrive from the LaCie's case. 3) Install the harddrive out of the LaCie into the external 3.5 IDE enclosure. An example of a 3.5 IDE (PATA) external enclosure,
Two things to try first before we go further with the diagnosis: 1. Try to power up the netbook with the external hard drive disconnected & see if it will work. 2. Try powering up the netbook from the AC adapter only with the battery removed.
It may be the problem that occurs with a lot of USB powered devices jrherrer. Not enough power provided.
The USB cable plugged into the computer, provides signal wires for transferring information back, and forth, and also provides 5 Volts DC for power. (Two D cell flashlight batteries produce 3 Volts DC)
[ Below shows the Signal pins, and the Voltage pins of the USB B Mini style connector, (Male), used to connect to the SimpleDrive Mini external harddrive,
Pin 1 is for the 5 Volts DC Positive (Wire color - Red) Pin 2 is for the D- Signal (Wire color - White) Pin 3 is for the D+ Signal (Wire color - Green) Pin 4 is not connected. (Or sometimes joined to Pin 5 with a Resistor) Pin 5 is for the Ground (Wire color - Black)
Just added info in case you wanted to know ]
From what I see the SDM/250RW has a USB port on the side, and a DC Power Jack, used for an AC adapter, also. (Round port with a pin in the center)
From what I see stated from Hitachi, and sellers on the 'net, the AC adapter may not be provided. Many of those who provide a review state that both the USB cable, and the AC adapter is needed to provide enough power. Seems to be a power hungry external harddrive
It's a 2.5 Hitachi SATA laptop harddrive inside that external case. (The Harddrive is 2 and a half inches across in Width. Common size used for laptops)
When using an external device powered by a USB cable there are general guidelines to follow, A) The USB cable should not be more than 2 feet in length B) Connect the device directly to your computer, instead of through a hub, or other device, unless the USB hub has it's own power.
2) USB cable:
Could be a faulty USB cable, although I imagine you have tried different ones by now.
3) Interface Circuit Board:
The Hitachi SATA 2.5 harddrive inside the SImpleDrive Mini SDM/250RW, plugs into a small circuit board located inside that external case.
Components on the circuit board may be fried, or the Harddrive may have come loose from the interface.
Loose from the interface To explain; The back of the harddrive has connector pins sticking out. The interface has socket holes which the pins insert into.
Faulty circuit board The external case of the SimpleDrive Mini SDM/250RW can be carefully opened up, and the Hitachi SATA 2.5 harddrive extracted out.
Another inexpensive external case for a 2.5 SATA harddrive can be procured, and the Hitachi harddrive put in it.
first of all , you are looking at the wrong voltages. The important voltage is the DC OUTPUT, which is the voltage the external harddrives use AND the polarity of the plug attached to the harddrive end of the cable.
if both the harddrives have say 12v dc output and both have the insignia of the center conductor being + (posative) then you can interchange them. and you CAN run a 9volt unit with 12volt DC power, but not the other way around.
Look at your power adaptors again for the OUTPUT and polarity.
should be a half-circle with lines depicting the polarity(+,-) of the center and sheild connections to the hard drives printed on both the harddrives and the power adaptors . This can also be tested with a dc volt meter while the adaptors are plugged into the wall.
DO NOT try to test the AC end while plugged in!!
Try to connect the AC adaptor of your laptop and plug it to the wall outlet and let it charge for 3 hours or more. When you plug it on the wall socket, it won't show the laptop's led blinking since it was totally drained. But after 3 minutes or more, it will start to show the blinking led to indicate charging. When blinking stops led light disappears, it is fully charged and ready to use.
Remember: Do not use your laptop while it is plugged in to save your battery life. When at home, remove the battery while it is fully charged and plug the AC adaptor directly to the wall outlet. It will still work without the battery as long as it is plugged directly to the wall socket.