No Beep but boot up fine

Hello all,

Do any one know what is the problem of a no beep when I start power up an Intel Desktop board D865GBF, D945GNT and DG33FB? All these model of mother boards are running with Kingstone RAM from 1GB to 2GB. Western Digital HDD, Channel Well or Enhance industrial graded power supply. Window XP installed.

I build computer and do hardware/integration at work. I recently found all these boards are boot up just fine but no beep when boot up even without any PCI interface card intalled. Window XP is also worked as normal.

1. First I thought the built-in on board speaker is bad, but I boot up with no RAM installed, error code beep right up. That can tell me that Speaker is function just fine.

2. I tried to swap all kind of different PSU, it is still no beep when boot start.

3. The reason I need to fix this issue because our software is depend on the mother board speaker when certain feature option is selected by users. and the internal speaker will beep along with the selection.

Please advise,

Best,

tjpro4