Dell Inspiron 1521 Owner's Manual page 102

After you have selected the Test System option from the main menu, the
following menu appears.
NOTE:
It is recommended that you select
below to run a more thorough check of the devices in the computer.
Option
Express Test
Extended Test
Custom Test
Symptom Tree
For any problem encountered during a test, a message appears with an error
code and a description of the problem. Write down the error code and
problem description exactly as it appears and follow the instructions on the
screen. If you cannot resolve the problem, contact Dell (see "Contacting Dell"
on page 175).
NOTE:
The Service Tag for your computer is located at the top of each test screen.
When contacting Dell support, have your Service Tag ready.
102
Troubleshooting
Function
Performs a quick test of system
devices. The test typically takes 10 to
20 minutes and requires no interaction
on your part. Run Express Test first to
increase the possibility of tracing the
problem quickly.
Performs a thorough check of system
devices. The test typically takes an
hour or more and periodically requires
your input to answer specific
questions.
Tests a specific device in the system
and can be used to customize the tests
you want to run.
Lists a number of common symptoms and
allows you to select a test based on the
symptom of the problem you are having.
Extended Test
from the menu