How to Troubleshoot a CF-28
Panasonic's Toughbook line of laptop computers is built to withstand extreme field conditions while remaining fully operable. Even among Toughbooks, the CF-28 is particularly remarkable for its resilience, due to its magnesium-alloy case, shock-mounted hard drive and moisture-resistant design. Despite these features, even the best of machines can break down and the CF-28 has a variety of error codes and indicator lights to assist you in troubleshooting.
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Instructions
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Connect your Toughbook to its AC charger and connect the charger to a functional wall socket. The battery indicator light on the front panel of the computer should illuminate in red, orange or green. If it does not, remove the battery from its compartment on the right side of the computer and reinsert it, ensuring that it slides all the way into the back of the compartment. If the light still does not illuminate, your Toughbook either needs a new power cable or it has a broken power jack.
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2
Inspect the computer's battery indicator light. If the light is blinking orange, the computer is too warm or too cold to charge the battery properly. Relocate the computer to a room temperature environment. The computer's battery must be between 50 degrees F and 122 degrees F to charge properly. If the light is blinking red, either the battery or charger is defective.
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3
Slide the power switch to turn the computer on. If your computer can not boot into Windows, restart and press "F2" when the message "Press F2 to Enter Setup" appears on the screen. Enter the setup password, if you computer has one. Press "F9" to restore the computer to its default settings, this will not affect your saved data but it will alter your hardware configuration. Restart your computer and attempt to boot into Windows.
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Hold "Fn" and press "F3" twice while your computer is running to toggle displays. Connect your computer to an external display via its 15-pin video connector and hold "Fn" while pressing "F3" twice again. If your computer is running but still not displaying video after this step, the onboard graphics adapter is damaged.
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Reinstall Windows with the recovery disk and recovery instructions that came with your Toughbook. Reinstalling Windows will delete all of the data that you have saved on your computer. Consult an expert for assistance in backing up your data and reinstalling Windows.
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Tips & Warnings
Identify the problem by the error code that appears while your computer starts. Error code "0200" indicates that your hard drive is not working properly. Codes beginning with "021" indicate keyboard problems. "023" codes indicate a problem with your computer's RAM. Codes beginning with "025," "026," "027" or "028" represent problems with your motherboard's on-board memory or system timer. "02B" error codes indicate an issue with one of the computer's diskette drives. "02D" codes represent cache problems. "02F" codes represent a processor error or a failed system test.
