220-1201 Practice Question: A technician is troubleshooting a workstation…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  The 20+4 pin connector is not fully seated

  Why it's wrong here

  The 20+4 pin ATX main power connector supplies power to the motherboard's chipset, RAM slots, PCIe slots, and other integrated components. If this crucial connector were not fully seated, the entire system would likely fail to receive any power whatsoever, or experience intermittent power cycling. While a fundamental check, the scenario implies a more specific power delivery issue, making a problem with the CPU's dedicated power connection a more targeted and probable cause after initial connection attempts.

• ✗

  The power supply switch is turned off

  Why it's wrong here

  While checking the power supply's physical switch is a foundational troubleshooting step for any system that fails to power on, the scenario typically assumes such basic external checks have already been performed. If the power supply unit (PSU) switch were off, the workstation would exhibit absolutely no signs of life, and a technician would almost certainly verify this before delving into internal component connections. Therefore, this is not the next logical diagnostic step in a situation implying a more nuanced internal power delivery problem.

• ✓

  The 4+4 pin CPU connector is only using one 4-pin half

  Why this is correct

  Modern CPUs, particularly those requiring higher wattage, demand a dedicated 8-pin EPS12V power connector to ensure stable and sufficient power delivery for initialization and operation. If a technician mistakenly connects only one 4-pin half of a 4+4 pin CPU power cable to a motherboard designed for a full 8-pin input, the CPU will not receive the necessary current and voltage. This critical power deficiency prevents the CPU from initiating its boot sequence, resulting in the workstation failing to power on or display any output.

• ✗

  The RAM is not properly seated

  Why it's wrong here

  When RAM modules are not properly seated, the system typically powers on (fans spin, lights illuminate) but fails to complete the Power-On Self-Test (POST) sequence. This often triggers specific beep codes from the motherboard or illuminates diagnostic LEDs indicating a memory error. Since the problem states the workstation "fails to power on" entirely, it points to a more fundamental power delivery issue preventing initial system startup, rather than a POST-related component failure like unseated RAM.

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