220-1201 · Question #419
A technician is building a high-powered workstation. When the technician attempts to start the workstation, nothing happens. The technician verifies that all power connectors are fully seated. Which…
The correct answer is A. The case header pins are not connected. When a newly built workstation shows no response at all-no fans spinning, no indicator LEDs, and no POST activity-this indicates that the system is not receiving the signal to power on. Since the technician has already verified that all primary power connectors are fully seated…
Question
A technician is building a high-powered workstation. When the technician attempts to start the workstation, nothing happens. The technician verifies that all power connectors are fully seated. Which of the following is the most likely cause of the issue?
Options
- AThe case header pins are not connected.
- BThe RAM is not fully seated.
- CThe power supply unit's wattage is too low.
- DThe CPU fan connector is faulty
How the community answered
(41 responses)- A61% (25)
- B5% (2)
- C10% (4)
- D24% (10)
Explanation
When a newly built workstation shows no response at all-no fans spinning, no indicator LEDs, and no POST activity-this indicates that the system is not receiving the signal to power on. Since the technician has already verified that all primary power connectors are fully seated (including the 24-pin ATX motherboard connector and the 4-pin or 8-pin CPU power connector), the most likely cause is that the case header pins are not connected to the motherboard. The power button on the computer case connects to the motherboard via the front-panel (system panel) header, specifically the PWR_SW pins. If this connector is missing, improperly placed, or connected to the wrong pins, pressing the power button will do nothing because the motherboard never receives the power-on signal.
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