Hi,last week my HDD does not detect in BIOS and I open HDD cover and look insite the inner parts.then I close the cover and setup in my motherboard. But my HDD can't run normally.I heard such a sound "Ka ***, Ka ***, Ka *** " and I wait to see my BIOS setting till 5 minutes.When BIOS setup is appear,my HDD doesn't detect in BIOS.So,please point to me how to reinstall my HDD to work as earlier time. Many of essential data in my HDD. :(

Hello
You have done a great mistake, by opening the hard drive without proper enviornment. It should only be opened at static free and sust free [ an extreemely clean] enviornment. Dudt with 2 microns will get damage the device. it shouldn't be opened. There is nothing you can do by yoursef. The work inside a hard disc should be doneby a well experienced and trained personnel and a very clean envionment, dust free, static free, and so on. It is very like an open heart surgerey. Sometimes mor than that. OK.

As friendly advise...your HDD is on its way out. What you will need to do at this moment is try to recover and transfer your data to a new HDD if possible. PM me if you want my service (I can recover and transfer your data). It will not cost you much. I got an affordable service. My PM is dicxs_lpt2 at yahoo.com I will be happy to help you.