How to fix a hardware (like hard disk problem) problem within a computer?

• hardware related problems
• Hardware related problems like hard disk

Link for recognising and solving common Hardware Problems
http://www.washington.edu/lst/help/computing_fundamentals/troubleshootingxp/common_hardware

Link to discussion forums on frequent computer hardware problems and its possible solutions.
http://www.softwaretipsandtricks.com/forum/hardware-problems/

Here is a link demonstrating ways to diagnose PC Hardware problems
http://www.acmehowto.com/howto/pc/problems/diagnosis.php