IBM ThinkPad R40 series Service Manual page 39

Solving computer problems
To avoid or reduce this problem, you can choose the following mode of
operation, as follows:
v Maximum Performance: Keeps the processor speed high at all times.
To choose a mode, do the following:
1. Start the ThinkPad Configuration Program.
2. Click Power Management.
3. Click the Intel SpeedStep technology tab.
4. From the list, select the mode you want.
5. Click OK.
Problem: The computer cannot play a CD, or the sound quality of a CD is not
good.
Solution: Please use the disk corresponding to the standard of each country,
such as that by which the Compact Disk Logo mark went into the disk label
side. Playing or sound quality of the disk outside CD standard are not
guaranteed.
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Chapter 2. Solving computer problems