Dell Inpsiron 560s (Late 2009) - Manual (Page 29)

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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 34 or “Contacting Dell” on page 56.
Beep Codes
Your computer might emit a series of beeps during
start‑up if there are errors or problems. This series
of beeps, called a beep code, identifies a problem.
Write down the beep code and contact Dell
(see “Contacting Dell” on page 56).
Beep Code Possible Problem
One
Possible system board failure —
BIOS ROM checksum failure
Two No RAM detected
NOTE: If you installed or
replaced the memory module,
ensure that the memory module
is seated properly.
Three Possible system board failure —
Chipset error
Four RAM read/write failure
Five Real Time Clock failure
Six Video card or chip failure
Seven Processor failure
INSPIRON