Entering The Service Tag In The Bios - Dell inspiron M4040/14-N4050 Owner's Manual

16. Enter the service tag. See Entering the Service Tag in the
Entering the Service Tag in the BIOS
1. Ensure that the AC adapter is plugged in and that the main battery is installed properly.
2. Turn on the computer.
3. Press <F2> during POST to enter the system setup program.
4. Navigate to the security tab and enter the service tag in the Set Service Tag field.
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BIOS.