Computer Hardware
With a dot matrix printer, light then dark print is most commonly caused by:

None of these
Misaligned print head
Erratic ribbon advancement
Erratic paper advancement
Overheating print head

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Computer Hardware
Which would you do first when troubleshooting a faulty monitor?

Power down the monitor, then turn it on again to see if that corrects the problem
Power down the computer, then turn it on again to see if that corrects the problem
Check its connections to the computer and power source
Use a meter to check the CRT and internal circuitry for continuity

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