I recently replaced a motherboard in a Gateway M-6864fx laptop. Everything works fine except i dont get any audio from it any longer. I disassembled the laptop a 2nd time and made sure i had everything connected and im about 90% sure i have all the cables connected properly. When i go to my device manager it lists 4 unknown devices for the system. 3 of the devices cannot be used since i downgraded the operating system to XP instead of vista, prior to replacing the motherboard and they only pertain to the dvd play buttons. The 4th driver, when i go to update it, is for IDT high definition audio. If i go to sound properties in control pannel for the sound playback option i already have ATI HD audio rear output. But that has never given me any sound ever, and thats the only option i have for audio. But before i replaced the motherboard i could elect IDT audio and that would give me sound. Now when i go to update the audio through device manager, it seems to install but then always has warning or ? on it and it never fully installs properly. When i go and download IDT drivers and try and install it it gives me. _ExitError: Error=Device Object not present, restart the system and run setup again. So i dont know if i have the right driver or not or if its some issue with the downgrade from vista to xp. What i do know is that i had it working once before. I tried system restore to before i had replaced the motherboard and that didnt work either. If you need any more information to help fix the problem let me know ill supply whatever is needed.