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Your motherboard may not have a built in speaker. If you had a desktop you can get the tiny plug in speaker and then you would get the beep tone but with a laptop you would not have that option. The system speakers would not typically give you these tones and are not accessible to the CMOS/BIOS, it must be a tiny motherboard speaker with very a small current draw.
You have to be a little bit crazy to keep you from going insane.