Dell Alienware M15x (Early 2011) - Manual (Page 100)

CHAPTER 22: SYSTEM BOARD
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The system board’s BIOS chip contains the Service Tag, which is also visible on a
barcode label on the bottom of the computer. The Service Tag has to be entered
in the replacement system board’s BIOS chip using the System Setup utility.
CHAPTER 22: SYSTEM BOARD
CHAPTER 22: SYSTEM BOARD