Depending on why the data were not available, and should take various measures to recover information from failed hard disk. The most likely reasons why cast the disk fails to be correctly displayed are the following.
Common situation where the hard drive is detected by Windows and can be accessed, but you don't see any data on it, or a message appears stating that you need to format it. This means that damaged its file system. The solution to this problem is good software to recover files. You can try several options, the most famous such application is Recover My Files. Free demo version of this program will not allow you to fully use the functionality, but displays the data that can be restored. So, if you see that the contents of your drive can be returned, you can pay for the full version of the application and complete the process.
However, this software has its drawbacks. If the file type is not contained in the list of program settings, these data do not, in principle, can be restored. Although the list of available extensions is quite wide, and you will be able to find data deleted even several years ago. Remember that to boot then you must stick or other portable media.
If the computer do not detect the hard disk or even does not turn on, the problem may be a malfunctioning circuit Board hard drive. You can replace this component yourself. The new card can be purchased in many online stores, but, before buying, pay attention to technical characteristics and the type of data these data may be very different.
If Windows detects the hard drive but you can't access it or format is probably the case in the contamination of the contacts on the Board. Usually when this happens, you can hear the so-called "death noise". To solve this problem try the following steps: remove the main Board from the bottom of the hard drive and clean the bottom contacts.
The file system is corrupted
Common situation where the hard drive is detected by Windows and can be accessed, but you don't see any data on it, or a message appears stating that you need to format it. This means that damaged its file system. The solution to this problem is good software to recover files. You can try several options, the most famous such application is Recover My Files. Free demo version of this program will not allow you to fully use the functionality, but displays the data that can be restored. So, if you see that the contents of your drive can be returned, you can pay for the full version of the application and complete the process.
However, this software has its drawbacks. If the file type is not contained in the list of program settings, these data do not, in principle, can be restored. Although the list of available extensions is quite wide, and you will be able to find data deleted even several years ago. Remember that to boot then you must stick or other portable media.
Program Recover My Files does not allow to save the recovered files on the same hard drive that is scanned. Therefore, you must connect a USB flash drive or portable external hard drive.
Hard drive not detected at all
If the computer do not detect the hard disk or even does not turn on, the problem may be a malfunctioning circuit Board hard drive. You can replace this component yourself. The new card can be purchased in many online stores, but, before buying, pay attention to technical characteristics and the type of data these data may be very different.
The price of the hard disk can be quite large. Much cheaper to buy a used hard drive with a working Board and swap it yourself.
Hard disk is detected but not working
If Windows detects the hard drive but you can't access it or format is probably the case in the contamination of the contacts on the Board. Usually when this happens, you can hear the so-called "death noise". To solve this problem try the following steps: remove the main Board from the bottom of the hard drive and clean the bottom contacts.
