Have been using the hard drive for music videos etc been working fine up until this weekend Power supply green light flashes when hard drive plugged in and no green light on hard drive....what could be the problem and are there any solutions???
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This situation indicates a problem with the built-in self tests. Most likely a power supply failure. I don't believe it is economically feasible to replace the power supply. If it is still under warranty, I'd go through the procedure to get it repaired/replaced. Otherwise, you'll need to replace the unit.
Could be a bad transformer on the power supply or a bad drive. You could check the voltage coming from the transformer and verify that it is the proper voltage using a fluke meter. You could also dis-assemble the hard drive housing and try installing it in the computer and check if it is working. If you install it in the computer and the drive is not found then the drive is probably bad. If the drive works in the computer then get a new transformer.
The exact same thing just happened to me (WD elements 500 gig) and it's only about 10 months old. I called the customer help line (on the official website) and after they asked me what the serial number of my HD was they were going to send me a new power supply. Simple as that. They said they'd be able to send it out early next week. I'm hoping that the HD didn't get fried and it's just the power supply but what you've described is EXACTLY what is happening to mine.
The USB Isn,t supplying/providing enough Power to the device.
Search e-bay or similar for a 2 into 1 USB Cable.
Then power the unit with 2 USB Ports on the Computer.
2 x USB Into 2 x Sockets On P.C. 1 x Into Device Drive.
This will be enough power to operate the Device Correctly.
I,ve done this on several external Drives, never failed for Me.