Internal speakers gives no sound for model cq45-102tx

I have cq45-102tx. I downgraded from vista basic to XP SP2. When i downgraded the OS, bios version is upgraded to F.24 from F.12 but i can't install IDT HDA Codec, so i get error messages "no audio device installed" if i play audio. To solve that problem i downgraded bios to F11.E version and i can install IDT HDA Codec driver. Now i can hear sound from external speakers but Internal speaker gives no sound. How to solve this problem?. Thanks

There is a cable connector that is used with the speakers. Make sure it is connected. The cable connector is under the keyboard bezel. Drill down on the T61 manual: http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-67760
T60: 6371-CTO, VISTA Home Premium+SP1, 2GB....R51: 1836-Q4U,XP,1GB...600...755CD

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Internal speakers gives no sound for model cq45-102tx

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