Service manual

Running the Dell Diagnostics: Dell Latitude CP
receive data.
● Shared RAM Test
Performs a memory test on controllers with memory-mapped shared RAM. On
controllers with first-in
first-out (FIFO) shared RAM, writes a data pattern to all locations and reads the pattern
back to verify the operation. Some controllers do not support shared RAM tests.
● Display Information Test
Displays address and configuration information about the network controller. This
information includes the network address used for communication on the local area
network (LAN) and the controller's IRQ level. You can make sure there is not an
interrupt conflict by verifying that the IRQ level is not being used by another device
connected to the system.
Audio Test Group
The subtests in the Audio test group check the functions of the audio controller and the
computer's recording and playback features.
Why Run an Audio Test
If you do not hear sounds from your built-in speakers when you expect to, it is possible that
your operating system or sound application uses resource settings different from those of the
audio controller in the computer. In the absence of an expected sound, first check the
documentation that accompanied your operating system or sound application to see if the
sound features are correctly configured to work with the computer. The default resource
settings for the audio controller are:
● DMA channel: 1
● IRQ line: 5
● Port address: 220h
If necessary, change the resource settings in your operating system or sound application to
match these default settings.
If you still do not hear sound when you expect to, run the Audio test group.
file:///I|/SERVICE%20MANUALS/DELL%20MANU...ES%20REF%20AND%20TROUBLESHOOTING/RUN.HTM (35 of 37)6/21/2004 1:38:45 AM