Have Iomega DHD250 external hard drive. Hardly used. Last used about 4 months ago. Now I can't get the drive's power light to go on. The AC adapter between the power source and the drive has a green light, but not the drive. An adapter problem? A drive problem?
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Re: No Power to External Hard Drive
Do you have access to a multimeter or voltmeter? If you do you can check the voltage coming out of the adapter and make sure it matches what the power adapter says it is. If it doesn't, then it is the power adapter. If it does, then it is the drive or enclosure.
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My Iomega external hard drive was working this morning but now will not open. Thgere is power and seemingly activity but my desktop either does not see it or does not recognise it. it also sounds as though the drive is beeping
Probably not the right answer for your problem. Mine is an external 1 TB Simple Drive. Mine wouldn't respond at all. I unplugged the power cable from the back of the hard drive and replugged it in and instantly it worked (with the computer and hard drive plugged in). I had tried rebooting the computer, plugging/unplugging over and over into the computer and that didn't work.
Well this is a tough one. I am assumeing that you have done all the normal things.
Most external hard drives are just a standard internal hard drive with a case and a IDE/SATA to USB adapter built in. When you plug in the drive and it powers up listen to the drive if you hear a clunk. Not a the happy ticking of a normal drive but a bad clunk. This can mean that the controller on the hard drive itself is bad.
If everything sounds happy then I would try replacing your power adapter. I know that the blue light goes on but most of that runs off the 5 volt leg of the power supply (I have has some hardware manufacturers actually pull the power light voltage from the USB port Grrr) most of the Large sized external hard drives use a 12 volt adapter and it can have no problem with the step down to 5 volt it may have a problem with the 12v.The 12v is what it uses to spin the drive. Unless you have one of those little drives. They use a laptop hard drive that works of a lower voltage. Most of the time you can get an adapter from Radio Shack. Be sure to bring the old one so they can get the Volts, amps, poleartity and the type of connector. It is worth a try and keep the reciept. If it is just bad I am sorry but the only way to get the data off is to break into the unit and pull the hard drive out. Then use another USB to IDE/SATA adapter to pull the data off.
Hope this helps a little.