单选题A computer is failing to boot. Which of the following tools would be used FIRST in troubleshooting? （）ATime Domain Reflectometer (TDR)BOscilloscopeCPower supply testerDSpectrum analyzer
单选题
A computer is failing to boot. Which of the following tools would be used FIRST in troubleshooting? （）
A
Time Domain Reflectometer (TDR)
B
Oscilloscope
C
Power supply tester
D
Spectrum analyzer
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