|Your problem is common.|
The board in your external hard drive enclosure is probably OK, if you HAVE NOT
- dropped the external enclosure or otherwise subjected it to a physical trauma .
- spilled liquid on it or exposed it to liquid such as rain or you sprayed it with liquid.
People frequently think their external drive enclosure's board is damaged, or the hard drive inside of it is defective or damaged, but in most cases, there's nothing wrong with it !
Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:
Check that out first.
Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.
If you have a desktop computer, Note that I answered a Topic on this site where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.
If you HAVE dropped it or exposed it to liquid, the board inside the external enclosure MAY be damaged
If it's a hard drive enclosure that has a 2.5" hard drive inside of it, often called a "Portable" external drive, that did not come with an external power adapter that you must plug into the external enclosure, if you dropped the external enclosure or otherwise subjected it to a physical trauma, it's a lot more likely that the hard drive inside the enclosure is damaged, than if you have an external enclosure with a 3.5" hard drive inside of it, which is much larger and DOES come with an external power adapter that you must plug into the external enclosure,
If the board is NOT okay, then
- if the hard drive inside the external enclosure is SATA, the two sockets on it for data and power are universal - they're the same size whether the drive is a 2.5" (laptop sized) hard drive, or a 3.5" (desktop sized) hard drive.
You can connect them to any desktop computer internally that has a SATA data header on the mboard and a SATA power connector coming from the power supply.
If the external drive enclosure / hard drive inside of it was a combo you bought at the same time,and not more than about 5 years old, the hard drive is probably SATA.
- if the the hard drive inside the external enclosure is EIDE (IDE).....
- if it's a 3.5" (desktop sized) drive it can be directly connected internally to any desktop mboard that has an IDE header and a spare connector on a data cable
- if it's 2.5" (laptop sized),it's dataheader is smaller and different from that on a3.5" (desktop sized) drive and you must use
- an inexpensive laptop IDE to Desktop IDE adapter, probably available locally, to connect it internally to the IDE data cable on a desktop computer
OR - either type of drive can be
- installed in an external drive enclosure suitable for the size and type of the hard drive,and be connected via a USB connection to any computer
- used with an inexpensive adapter, maybe available locally, that allows you connect the drive via a USB connection to any computer (it does not have an enclosure the hard drive installs in.
You need to connect your drive to a working computer that has an operating system on it.but don't attempt to boot from your drive on that computer if it has a 2000 or up operating system on it.
If the hardware of your mboard and the other mboard are more that a little different, the operating system on your hard drive will probably NOT load all the way anyway on the computer that has a 2000 or up operating system.
You just need to determine whether or not the hard drive is physically okay and the data that was on it is intact.
(If you can no longer access data on it that you know was on it, if the hard drive itself tests fine when you use hard drive manufacturer's diagnostics on it, see the info at the link I supplied and try using a program that can propably recover the data.)