On the Subject of Forget Me Not

This one likes attention, but not too much attention.

• The main display will update on each solved module*. The current display stage is shown on the smaller display.
• Add the displayed number to the corresponding number gained from the chart below, and record the least significant digit from the total. This is the calculated number for that stage.
• When all other modules* have been completed, the display will turn blank.
• Press the calculated numbers on the keypad in the order they were obtained.
• If an incorrect calculated number is entered, the button for the displayed number for that stage turns green.

First number: If the bomb has an unlit CAR indicator, the number is 2. Otherwise, if the bomb has more unlit indicators than lit indicators, the number is 7. Otherwise, if the bomb has no unlit indicators, the number is the number of lit indicators. Otherwise, the number is the last digit of the serial.

Second number: If the bomb has a serial port and 3 or more digits in the serial, the number is 3. Otherwise, if the previous calculated number was even, the number is the previous calculated number plus 1. Otherwise, the number is the previous calculated number minus 1.

All other numbers: If either of the previous two calculated numbers were 0, the number is the largest digit in the serial. Otherwise, if both of the previous two calculated numbers were even, the number is the smallest odd digit in the serial, or 9 if no such digit exists. Otherwise, the number is the most significant digit of the sum of the previous two calculated numbers.

*Some modules are ignored by Forget Me Not modules.