单项选择题
A user reports that their PC is making a strange noise. Which of the following is the cause of the problem?（）
A. A network cable is vibrating against the system case.
B. An internal wire is improperly routed and is hitting the CPU fan.
C. The thermal grease on the CPU has dried out and needs to be replaced.
D. The CPU needs to be reseated.
相关考题
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单项选择题
Which of the following is the BEST tool to troubleshoot a DB-9 port?（）
A. Ohm meter
B. Anti-static wrist strap
C. Oscilloscope
D. Loopback plug -
单项选择题
A laser printer displays ‘perform user maintenance’. The manufacturer’s information was not available when the user performed the maintenance, and the laser printer continues to display the maintenance code. Which of the following items needs to be performed?（）
A. The printer needs to be sent to the manufacturer for maintenance.
B. The printer’s firmware needs to be updated.
C. A printer system reset must be performed.
D. The maintenance page counter must be reset. -
单项选择题
A technician has just installed a new power supply into a desktop computer and now the computer will not turn on. Which of the following is the MOST likely cause?（）
A. The voltage selector switch on the power supply is set incorrectly.
B. The 3.3v power line is connected to the wrong input on the motherboard.
C. The new power supply voltage rating is too high.
D. The 12v power cord is installed incorrectly.
