Question

1. a user installs a new cpu, but the system will not boot. the fans spin, but no display appears. what is the most likely cause? a) incorrect cpu fan header connection b) unsupported cpu for the motherboards bios version c) faulty power supply d) loose sata cable

Explanation:

• Option A: If the CPU fan header connection is incorrect, it might not directly prevent the system from booting (though it could cause overheating issues later, but fans spinning indicates power is reaching components somewhat).
• Option B: An unsupported CPU for the motherboard's BIOS version is a common reason for a system not booting. When a new CPU is installed, if the BIOS doesn't have the necessary microcode or support for that CPU model, the system may not initialize properly even if fans spin (as fans just need power, but the boot process requires proper CPU - BIOS interaction).
• Option C: A faulty power supply might cause no fans to spin at all (if it fails to supply power) or inconsistent behavior. But here fans are spinning, so a faulty power supply as the main cause is less likely.
• Option D: A loose SATA cable would affect storage devices (like hard drives/SSDs) but not prevent the system from booting to the point where fans spin but no display (the boot process can start without storage devices detected in some cases, but it would give different error signs than just no display with spinning fans).

Answer:

B. Unsupported CPU for the motherboard's BIOS version