单选题Which of the following is the FIRST step a technician should take when troubleshooting a device issue？（）AGather information from the customer.BIsolate the problem on the device.CRead the service documentation for possible causes.DCheck the parts life counters.
单选题
Which of the following is the FIRST step a technician should take when troubleshooting a device issue？（）
A
Gather information from the customer.
B
Isolate the problem on the device.
C
Read the service documentation for possible causes.
D
Check the parts life counters.
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