External hard disk power adopter issue

April 27, 2012 at 11:10:30
Specs: Windows Vista
The power supply of my external hard disk died
its seagate 500 GB
on the hard disk it shows:
+5V 0.72A
+12V 0.52A

The dead power supply has
INPUT: 100-240VAC,50/60Hz,0.5A
The new power supply that I bought was
INPUT: 100-240VAC,50/60Hz,2A
The problem is that the disk did not show up on my laptop when i used the new power supply
Can anyone suggest whether I should get the same configuration or not & why didn't the new one work?

See More: External hard disk power adopter issue

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April 27, 2012 at 12:28:09
Most external hard drives use a two wire AC adapter, but it looks like you have one of those 4 pin AC adapters. Seeing that it has both 12v and 5v lines.

So the voltage and amperage look correct, but the pin-out must be different. You can test what pins are what with a multimeter, or check the specs for the adapter.

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April 27, 2012 at 12:42:59
Hi Gretti

if you are correct and the pins are different, surely there is a danger if it has been connected to the external disc, it might have damaged it?

Regards - Mike

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April 27, 2012 at 12:49:16
Mike Newcomb

Very true, but good manufactures have a diode gate for protection on the PCB. Also if it is a good ac adapter it should have overload protection as well.

Hopefully, the OP hasn't damaged anything.

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Related Solutions

April 27, 2012 at 13:30:43
We have no idea of many of the needed facts here.

One is the state of the original system.
Two is how this new PSU actually works. You can't just guess. Many PSU's are rated in very different ways. Some are controlled both voltage and current. While others use the load to regulate
Third is the ac component of the psu.
If the old drive suffered some sort of catastrophic power issue it could have damaged any part.
If this deal were to work, it should show up in Admin tools, part of storage management mmc.

Text, talk, drive...CRASH.

Hang up and drive @#$%^^

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