BIOS-contained Model Number and Serial Number (Aptiva 2187, 2190 - SL-A)
The model number and serial number information is stored in BIOS ROM and displayed in the 'Model Information' of BIOS Setup main menu. If a repair is completed by replacing the system board or installing a new BIOS ROM, then you need to enter the original system's model number and serial number in the new BIOS ROM.
To enter the model number and serial number into BIOS:
Enter the serial number and press Enter to continue. You can type a
maximum of 7 characters (without spaces).
Follow the instructions on the screen to complete the procedure.