A customer brings in a PC that recently stopped working. The technician begins diagnosis and finds the following symptoms:
— The PC turns on and all fans spin normally
— No display output is given either from onboard video or a PCle video card.
— There are no POST beep codes at boot even with the CPU and RAM fully removed.
Which of the following is the MOST accurate conclusion based on these findings?
A. The PSU wattage is rated too low for the components.
B. The CMOS battery is dead and needs replacement.
C. The PSU has its voltage switch set to 240V.
D. The motherboard has failed and needs replacement.