220-1101 - Hardware and Network Troubleshooting - Section 5.2

Troubleshoot problems related to motherboards, RAM, CPU, and power, including POST codes, no-power and overheating symptoms, in a given scenario.

Diagnose core component failures from their symptoms - no power or POST, continuous reboots, BIOS time and setting loss (a failing CMOS battery), burning smells, and overheating shutdowns - and read POST beep codes and diagnostic LEDs. Distinguish a RAM fault (random crashes, blue screens) from a CPU or power-supply fault, and verify with appropriate tools such as a power-supply tester or multimeter.

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