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PC Hardware in a Nutshell, Second Edition by Barbara Fritchman Thompson, Robert Bruce Thompson

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Troubleshooting Display Problems

Troubleshooting CRT monitors versus FPDs begins with similar steps, but diverges due to the differing natures of the two display types. The first troubleshooting steps are similar for either display type: power down the system and display and then power them back up; make sure the power cable is connected and that the outlet has power; verify that the signal cable is connected firmly to both video adapter and display and that there are no bent pins; verify that the video adapter is configured properly for the display; try the problem display on a known-good system, or try a known-good display on the problem system; and so on. Once you’ve tried the “obvious” troubleshooting steps, if the problem persists the next steps you take depends on the type of display. The following sections cover basic troubleshooting for CRT monitors and FPDs.

Troubleshooting CRT Monitors

Monitors seldom fail outright without obvious signs, such as a loud snap or a strong odor of burning electrical components. Most monitor problems are really problems with the power, video adapter, cable, or hardware/software settings. To eliminate the monitor as a possible cause, connect the suspect monitor to a known-good system, or connect a known-good monitor to the suspect system.

If the monitor is the problem, it is often not worth repairing. If the monitor is out of warranty, parts and labor may cost more than buying a new monitor, which also gives you better specs and a warranty. ...

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