Specifications

To determine if the computer’s built-in speakers are functioning properly, perform the
following procedures. Figure 6-10 outlines the process. First adjust the speaker volume to an
appropriate level. Start with Procedure 1 and continue as instructed.
Procedure 1: Audio source test
Procedure 2: Earphone test
Procedure 3: Connection check
Procedure 4: Replacement check
Procedure 1 Audio source test
Try different audio sources (e.g. an audio CD and digital music file) to determine whether the
fault is in the speaker system or not. If not all sources have sound problems, the problem is in
the source devices. If all have the same problem, continue with Procedure 2.
Procedure 2 Earphone test
Connect a set if earphones or external speakers. If these function correctly, go to Procedure
3. If they do not function correctly, the system board may be defective or damaged. Replace
it with a new one.
Procedure 3 Connection check
Disassemble the computer following the steps described Replacement Procedures and
make sure the speaker cable is firmly connected to the system board. If the stereo speakers
are still not functioning properly, go to Procedure 4.
Procedure 4 Replacement Check
If the stereo speakers don't sound properly, the stereo speakers may be defective or
damaged. Replace them with new ones. If the stereo speakers still do not work properly.