Final answer:
The technician should first check the auxiliary power cabling for the video cards and then spot-check the I/O shield for the motherboard. If the problem persists, other troubleshooting steps can be taken.
Therefore, the correct answer is: option D). Spot-check that the I/O shield for the motherboard is properly installed.
Step-by-step explanation:
Beep codes during POST indicate hardware issues, and an unspecified beep code could suggest a problem with the graphics card. The lack of power to the video card can cause the system to shut down automatically.
If the issue persists, the technician should also spot-check that the I/O shield for the motherboard is properly installed. A misaligned or improperly installed I/O shield can cause grounding issues, leading to unexpected behaviors during boot-up.
Once these steps have been taken and if the problem still persists, then the technician should consider other troubleshooting steps like ensuring thermal paste is being used on the CPU and verifying the header panel connector is properly connected.