TestOut LabSim A+ Certification Practice Exam

If your computer won't start after replacing the motherboard, what is the first thing you should check?

1. The RAM connections

2. The power button connection to the motherboard

3. The power supply output

4. The BIOS settings

The correct answer is: The power button connection to the motherboard

When troubleshooting a computer that won't start after replacing the motherboard, the first thing to check is the power button connection to the motherboard. This is critical because if the power button isn't properly connected, the system will not receive the signal to power on, regardless of the state of other components. Checking the power button connection ensures that the motherboard is ready to receive power when the button is pressed. This connection is often overlooked, especially if the motherboard was not installed correctly or if cables were accidentally disconnected during the installation process. It is possible for this connection to be loose or miswired, leading to the system completely failing to power on. While connections for components such as RAM are important and the overall power supply output must be sufficient, those checks come after ensuring that the basic power mechanism—initiated by the power button—is functioning correctly. Similarly, BIOS settings would not be relevant until the system is powered on; thus, ensuring the power button is connected is the first and most essential step in the troubleshooting process.