IBM BIOS beep codes!

[Google]

These are the Beep Codes for IBM BIOS:

Beep Code == Description
No Beeps == No Power, Loose Card, or Short.
1 Short Beep == Normal POST, computer is ok.
2 Short Beep == POST error, review screen for error code.
Continuous Beep == No Power, Loose Card, or Short.
Repeating Short Beep == No Power, Loose Card, or Short.
One Long and one Short Beep == Motherboard issue.
One Long and Two Short Beeps == Video (Mono/CGA Display Circuitry) issue.
One Long and Three Short Beeps == Video (EGA) Display Circuitry.
Three Long Beeps == Keyboard / Keyboard card error.
One Beep, Blank or Incorrect Display == Video Display Circuitry.

By these codes you are certified to be a "Hardware PC Doctor"

[Sony]

ah...wala marra ntabahet kam beep bya3mil el BIOS bass wala marra 3katableh error

[Google]

Originally Posted by Sony

ah...wala marra ntabahet kam beep bya3mil el BIOS bass wala marra 3katableh error

The pc won't write anything on the screen unless it is the case when you hear 2 SHORT BEEP...
You didn't see an error on the screen because either your PC has no error or the error is not the error of the second case (2 SHORT BEEP).
Maybe you didn't understand for what are those codes, these are useful when you have a problem and the PC don't write anything on the screen about it, so you try to hear carefully what your PC is saying in order to know what is the problem.