How to identify the beep codes and messages in Dell inspiron series

The computer might emit a series of beeps during start-up if the monitor
cannot display errors or problems. This series of beeps, called a beep code,
identifies a problem. One possible beep code consists of repetitive three short
beeps. This beep code tells you that the computer encountered a possible
system board failure

Code- Description

1-   Possible system board failure - BIOS checksum failure.
2-   No RAM detected, ensure that the memory module is seated properly.
3-   Possible system board failure, chip set error.
4-   RAM Read/Write failure.
5-   Real time clock failure. Possible battery failure or system board failure.
6-   Video BIOS test failure, Video card or chip failure.
7-   CPU cache test failure, processor failure.
8-   Display failure.