单选题The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）APower supply has blown.BCPU fan is faulty.CMotherboard has overheated and shutdown.DUPS has been tripped.
单选题
The user turns on the computer and hears a popping sound and detects a burning smell. Thesystem will not power on. Which of the following is the MOST likely problem?（）
A
Power supply has blown.
B
CPU fan is faulty.
C
Motherboard has overheated and shutdown.
D
UPS has been tripped.
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