The document discusses testing computer systems and networks. It outlines three major components to test: hardware, software, and firmware. For hardware testing, it recommends checking the monitor and peripherals like keyboard and mouse, as well as I/O ports, power supply, and connection cables. Software testing involves checking the operating system for updates, application software updates, and running antivirus scans. Firmware testing means checking the BIOS configuration.

1. LESSON 4:
TEST SYSTEMS
AND NETWORKS

2. Testing Computer System
Is your PC healthy? Don't be too sure. Think
back to when you heard a kerklunk sound coming from
the hard drive. Or maybe you remember the last time
your Internet connection was down.
The best way to find out what's wrong is to take
a proactive approach: Check under your PC's hood with
the following mostly free diagnostic tools, and see if
anything is amiss--before disaster strikes.

3. Three Major Components of
Computer System:
Hardware
Software
Firmware

4. Test Your Hardware
Checking your computer hardware
and its peripherals.
1. Computer Monitor and its peripherals
Monitor and interface cables
Video card
Monitor power cable

5. 2. Keyboard and Mouse
Keyboard connector
Mouse Connector

6. 3. I/O port and devices
o Connection between the I/O port and the
peripheral device
o A faulty cable between the I/O port and the
peripheral device
o A faulty peripheral device
o Incorrect settings in the System Setup program
o Incorrect settings in the system's configuration
files Faulty I/O port logic on the system board

7. 4. Power supply
 Power cord
 Fuse

8. Testing Your Software
Check the different software installed in the
computer.
1. Operating system
 Run live updates for your operating systems to get the
latest patches and protection for your OS.
 Run registry scanners to check the OS registry
configuration

10. 2. Application Software
Check for live updates

11. 3. Anti-virus software
• Run anti-virus program
• Check for virus signature
updates
• Check for spyware updates

12. Test Your Firmware
Firmware- is a combination of hardware
and software integrated on a chip.
To test the firmware
Check for the correct configuration, you
can accomplish this by configuring the BIOS in
the computer