Dell Inspiron 11 (3147, Mid 2014) - Manual (Page 50)

Post-requisites
1 Replace the processor fan and heat-sink assembly .
2 Replace the memory module
3 Replace the battery .
4 Replace the base cover .
Entering the Service Tag in the BIOS
1 Turn on the computer.
2 Press F2 when the DELL logo is displayed to enter System Setup.
3 Navigate to the main tab and enter the Service Tag in the Service Tag
Input field.
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