Dell Studio 1457 (Late 2009) - Manual (Page 46)

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Solving Problems
This section provides troubleshooting
information for your computer. If you cannot
solve your problem using the following
guidelines, see “Using Support Tools” on
page 50 or “Contacting Dell” on page 71.
WARNING: Only trained service personnel
should remove the computer cover. See the
Service Manual at support.dell.com for
advanced service and troubleshooting
instructions.
NOTE: To replace parts, see the
Service
Manual at support.dell.com.
Beep Codes
Your computer might emit a series of beeps
during start-up if there are errors or problems.
The series of beeps, called a beep code,
identifies a problem. Write down the beep code
and contact Dell (see “Contacting Dell” on
page 71).