My drive boots up with all lights solid blue for about 15 seconds, then all of the blue lights go out completely. It still has a green Ethernet light, which does blink periodically indicating some network activity. I cannot locate this drive on the network using any of the LaCie tools for doing so.
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failing power supply?
You might have deep sleep on the Eco mode settings. The Lan is on in order to wake up from the interface.