Dell Alienware Aurora R2 (Early 2010) - Manual (Page 51)

51 CHAPTER 6: TROUBLESHOOTING
Beep Code Possible Problem
One Possible motherboard 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 motherboard failure — Chipset error
Four RAM read/write failure
Five Real Time Clock failure
Six Video card or chip failure
Seven Processor failure
Computer Problems
The computer fails the POST
The computer POST (Power On Self Test) ensures that all hardware is working
properly before starting the remainder of the boot process. If the computer passes
the POST, the computer continues to start normally. However, if the computer
fails the POST, the computer emits a series of beeps during start-up. The following
repetitive beep codes help you troubleshoot problems with your computer.
For assistance, contact Alienware (see “CONTACTING ALIENWARE“ on page 66).
NOTE: To replace parts, see the Service Manual at
support.dell.com/manuals.