Actually, it is quite important to know if your hard drive is dead before you decide to fix it or recover data from a dead hard drive. The most common dead hard drive symptoms are as below:

Corrupted areas on your hard drive

If you ever try to access files stored in these areas, your computer might respond by freezing. When frozen, a computer will not respond for several minutes. Its hardware devices such as the mouse and keyboard keys and all the active programs on the taskbar might get dormant.

If you shut down and restart your computer, the problem should be resolved itself to indicate that your disk is fine. But if the computer freezes again when trying to access files on the drive, the drive could soon fail.

Irregular computer maintenance

One thing that will indicate a rarely maintained computer is slow processing speed and lengthy boot sessions. It is imperative to run a disk defragmentation program once or twice a month to boost your computer. If you always do this and your computer is getting slower every day, your hard drive may die any day.

Mechanical damage

If your hard drive’s head crashes, it will no longer read, write or store data properly. You can tell that your disk has a mechanical fault by listening to the noises it makes when running. If you hear grinding, clicking or scraping noises, that’s a sign that the read-write head is scratched and damaged.

Tips for Dead Hard Drive Recovery

• If you discover that your hard disk is unresponsive, try to plug it on another computer to check if it’s really dead.
• Find reputable and effective software like Recoverit Data Recovery. Follow simple instructions to retrieve your data.
• If you cannot manually troubleshoot your dead hard drive, and recover data from it, consult a computer technician in your area.
• But if you can do it yourself, obtain every tool you will require before you start the process.

A dead hard drive can be worrying, as some of the lost data may be extremely important. However, you should not worry unless the lost files were corrupt. You can recover data from dead hard drive in full. These files can be retrieved in full.

But if you are currently not facing a dead hard disk drive, back up your data to be on the safer place. The easiest way to recover your data from a dead disk is via a bootable CD/DVD of Recoverit data recovery software.

Source: https://www.efogator.com/2020/04/how-to-tell-if-hard-drive-is-dead-and.html

If it's dead I though it's dead for good and it's not possible to recover anything from there. Unfortunately I've been mistaken.

efogator:
Actually, it is quite important to know if your hard drive is dead before you decide to fix it or recover data from a dead hard drive. The most common dead hard drive symptoms are as below:

Corrupted areas on your hard drive

If you ever try to access files stored in these areas, your computer might respond by freezing. When frozen, a computer will not respond for several minutes. Its hardware devices such as the mouse and keyboard keys and all the active programs on the taskbar might get dormant.

If you shut down and restart your computer, the problem should be resolved itself to indicate that your disk is fine. But if the computer freezes again when trying to access files on the drive, the drive could soon fail.

Irregular computer maintenance

One thing that will indicate a rarely maintained computer is slow processing speed and lengthy boot sessions. It is imperative to run a disk defragmentation program once or twice a month to boost your computer. If you always do this and your computer is getting slower every day, your hard drive may die any day.

Mechanical damage

If your hard drive’s head crashes, it will no longer read, write or store data properly. You can tell that your disk has a mechanical fault by listening to the noises it makes when running. If you hear grinding, clicking or scraping noises, that’s a sign that the read-write head is scratched and damaged.

Tips for Dead Hard Drive Recovery

• If you discover that your hard disk is unresponsive, try to plug it on another computer to check if it’s really dead.
• Find reputable and effective software like Recoverit Data Recovery. Follow simple instructions to retrieve your data.
• If you cannot manually troubleshoot your dead hard drive, and recover data from it, consult a computer technician in your area.
• But if you can do it yourself, obtain every tool you will require before you start the process.

A dead hard drive can be worrying, as some of the lost data may be extremely important. However, you should not worry unless the lost files were corrupt. You can recover data from dead hard drive in full. These files can be retrieved in full.

But if you are currently not facing a dead hard disk drive, back up your data to be on the safer place. The easiest way to recover your data from a dead disk is via a bootable CD/DVD of Recoverit data recovery software.

Source: https://www.efogator.com/2020/04/how-to-tell-if-hard-drive-is-dead-and.html

can you recommend someone that can fix a dead Hard disk in Lagos?