How does Computer Repair Work?

How does Computer Repair Work?
In the early days of computers, technicians would engage in what is called "component level repair." Plummeting equipment costs, explosive equipment complexity, and the rising costs of skilled labor has led to an almost complete decline of component level repair. Almost all computer repair is currently done by swapping out parts.
Component Level Repair
Each part of your computer consists of many smaller components. Your computers monitor, for example, will contain small components such as capacitors, resistors, transistors, and diodes. Most of the time these components will be stored inside integrated circuits.
When your monitor fails, it may be perfectly healthy -- except for one small capacitor. That capacitor might cost less than a dollar. Moreover, that capacitor can be replaced in about fifteen minutes -- returning your monitor to full health.
The difficulty is that component level diagnosis is very difficult. If can take hours of testing to determine which components need to be replaced. It doesn't take very many hours of a technicians time to exceed the cost of most computer parts.
This problem is exacerbated by the lack of aailable service manuals for most modern equipment. Computer technology is advancing so rapidly that most equipment is obsolete long before it fails. Because of this, most computer equipment manufacturers no longer take the time and effort to write useful service manuals for their equipment. Their point of view is that if a piece of equipment fails, it should be replaced.
Component level repair is also known as board level repair, as the technician is usually working on individual circuit boards.
System Level Repair
System level repair mostly involves determining which computer part has failed and replacing that part. In this context, the parts of a computer are items such as:
• Motherboard
• Monitor
• Hard drive
• DVD drive
• Video card
System level repair usually involves replacing parts until the system functions properly, and then putting the good parts back into the system.
Some system problems are the result not of failed parts, but of improper connections between parts. In those situations, the computer can be rebuilt using the original parts and it will function perfectly.

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