I don't suppose this sound card driver update, posted 4/25/08, is anything encouraging?
http://www-307.ibm.com/pc/support/site. ... MIGR-67816
Audio Features for Windows XP, 2000 - ThinkPad R61, R61i, T61, T61p, X61, X61s, X61 Tablet
This package provides the audio driver for Microsoft Windows XP SP2, Microsoft Windows 2000 SP4.
This package enables or updates the SoundMax Integrated Digital HD Audio function of the following systems:
- ThinkPad R61(type):
- 7732, 7733, 7735, 7736, 7737, 7738, 7742
- 7743, 7751, 7753, 7754, 7755
- 8914, 8918, 8919, 8920, 8927, 8928, 8929
- 8942, 8943, 8944, 8945, 8947, 8948, 8949
- ThinkPad T61, T61p
- ThinkPad X61, X61s, X61 Tablet
Summary of Changes
Version 5.10.1.5520
* (Fix) No sound recorded on the internal microphone.