4.0 Troubleshooting

4.2 Given a scenario, troubleshoot common problems related to motherboards, RAM, CPU and power with appropriate tools.

  • Common symptoms

    • Unexpected shutdowns

    • System lockups

    • POST code beeps

    • Blank screen on bootup

    • BIOS time and settings resets

    • Attempts to boot to incorrect device

    • Continuous reboots

    • No power

    • Overheating

    • Loud noise

    • Intermittent device failure

    • Fans spin – no power to other devices

    • Indicator lights

    • Smoke

    • Burning smell

    • BSOD

      When Microsoft Windows encounters a condition that compromises safe system operation, the system halts. This condition is called a bug check. It is also commonly referred to as a system crash, a kernel error, a Stop error, or BSOD. A hardware device, its driver, or related software might have caused this error.

      Blue Screen Of Death

      More on Blue Screen
      Demystifying the Blue Screen of Death

  • Tools

    • Multimeter

      Multimeter - Wikipedia

    • Power supply tester

      ATX Power Supply Tester - Video Demonstration

    • Loopback plugs A loopback plug is a connector used for diagnosing transmission problems. It plugs into a port, such as a serial, parallel, or an Ethernet port and crosses the transmit line to the receive line so that outgoing signals can be redirected back into the computer for loopback testing.

    • POST card


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