Computer Hardware
Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:

there are a lot more I/O addresses than IRQs.
I/O addresses cannot conflict
the BIOS sometimes has more of a problem controlling IRQs
software tends to correct I/O conflicts
software tends to mess up IRQs

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

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

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