Computer Hardware
On a dot-matrix printer, regular lube maintenance should be followed, but this component should never be lubed:

Platten bearings
Carriage rails
Printhead
None of these
Paper advance bearings

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Computer Hardware
What is the most likely cause of an "FDD controller Failure" error message?

None of these
you forgot to flash CMOS
you did not set the jumper on the floppy drive to drive A
your computer's floppy drive is defective
you installed the floppy disk drive cable backward

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