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56 Advanced Troubleshooting
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A possible USB failure has occurred. Reinstall all USB devices, check
cable connections, and then restart
the computer.
No memory modules are detected. • Reinstall all memory modules
(see page 95) and restart the
computer.
• To eliminate the possibility of a
faulty memory connector,
remove all memory modules
(see page 95), reinstall one
memory module (if the
computer supports a single
module), and then restart the
computer. If the computer starts
normally, move the memory
module to a different connector
and restart the computer.
Continue until you have
identified a faulty connector or
reinstalled all modules without
error.
Memory modules are detected, but a
memory configuration or
compatibility error exists.
• Ensure that there are no special
memory module/memory
connector placement
requirements (see page 95).
• Verify that the memory modules
that you are installing are
compatible with your computer
(see page 95).
• If the problem persists, contact
Dell (see page 113).
Light Pattern Problem Description Suggested Resolution
= yellow
= green
= off
A B C D
A B C D
A B C D
J2936bk0.book Page 56 Tuesday, September 2, 2003 3:06 PM