Panasonic U500 用户手册
User ’s Manual
9-2
Troubleshooting
Preliminary checklist
Consider the simplest solution first. The items in this checklist are easy to fix and
yet can cause what appears to be a serious problem.
yet can cause what appears to be a serious problem.
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Make sure you turn on all peripheral devices before you turn on the computer.
This includes your printer and any other external device you are using.
This includes your printer and any other external device you are using.
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Before you attach an external device, turn the computer off. When you turn
the computer back on it recognizes the new device.
the computer back on it recognizes the new device.
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Make sure all options are set properly in the setup program.
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Check all cables. Are they correctly and firmly attached? Loose cables can
cause signal errors.
cause signal errors.
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Inspect all connecting cables for loose wires and all connectors for loose pins.
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Check that your CD/DVD/CD-RW is correctly inserted.
Make notes of your observations and keep them in a permanent error log. This will
help you describe your problems to your dealer. If a problem recurs, the log will
help you identify the problem faster.
help you describe your problems to your dealer. If a problem recurs, the log will
help you identify the problem faster.
Analyzing the problem
Sometimes the system gives clues that can help you identify why it is
malfunctioning. Keep the following questions in mind:
malfunctioning. Keep the following questions in mind:
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Which part of the system is not operating properly: keyboard, hard disk drive,
optical media drive, display. Each device produces different symptoms.
optical media drive, display. Each device produces different symptoms.
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Is the operating system configuration set properly? Check the configuration
options.
options.
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What appears on the display screen? Does it display any messages or
random characters? Print a copy of the screen if you have a printer attached.
Look up the messages in the software and operating system documentation.
Check that all connecting cables are correctly and firmly attached. Loose
cables can cause erroneous or intermittent signals.
random characters? Print a copy of the screen if you have a printer attached.
Look up the messages in the software and operating system documentation.
Check that all connecting cables are correctly and firmly attached. Loose
cables can cause erroneous or intermittent signals.
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Do any indicators light? Which ones? What color are they? Do they stay on or
blink? Write down what you see.
blink? Write down what you see.
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Do you hear any beeps? How many? Are they long or short? Are they high
pitched or low? Is the computer making any unusual noises? Write down what
you hear.
pitched or low? Is the computer making any unusual noises? Write down what
you hear.
Record your observations so you can describe them to your dealer.