Service manual

Running the Dell Diagnostics: Dell Latitude CP
NOTE: Before running the Audio test group, enable the built-in speaker(s) to make
sure that the speaker volume has not been muted.
Subtests
The six subtests in the Audio test group confirm the following functions:
● Software Reset Test
Checks for the presence of an active audio controller in your system
● Interrupt Test
Checks whether the audio controller is generating an interrupt on the IRQ line
configured for that controller
● DMA Test
Tests for the presence of a DMA channel on the system chip set, and determiines if the
DMA controller and the audio controller can exchange signals
● FM Sound Playback Test
Tests whether the system can synthesize sounds and play them through the built-in
speakers
● Analog Sound Playback Test
Tests whether the system can play sampled sounds through the built-in speakers
● Record and Playback Test
Checks the ability of the audio controller to generate a sampled sound from signals
received from the built-in microphone
The last three Audio subtests are interactive. In both the FM Sound Playback Test and the
Analog Sound Playback test, a series of musical tones is played through the computer's built-in
speaker(s). A message on the display asks if you hear the tones. Type y if you hear the tones;
otherwise, type n.
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