Dell Inspiron 3500 - Manual (Page 99)

Running the Dell Diagnostics 4-17
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Coprocessor Error Exception Test
Verifies the math coprocessor’s ability to handle errors and to send IRQs to the
microprocessor.
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PCMCIA Test
Checks the functionality of the PC Card controller on the system board.
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USB Registers Test
Checks the onboard registers of the Universal Serial Bus (USB) interface. This
subtest does not test USB peripherals.
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USB Memory Structure Test
Tests the USB controller’s ability to access and understand standard USB data in
system memory.
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Temperature Range Test
Verifies that the temperature sensor is within the minimum/maximum range and
that the sensor can detect change.
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Fan On/Off Test
Verifies the fan’s cooling ability, and that it can be turned off and on.
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Battery Charger Test
Verifies that the battery charger produces a voltage and that the battery holds a
charge.
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The subtests in the Video test group verify the proper operation of the video controller
and the video control circuitry installed in the computer. These subtests check for the
correct operation of the readable registers in the video circuitry and the controller.
They write, read, and verify data patterns in the cursor registers of the controller. The
Video test group also provides additional subtests to test the color features of the
color display or an external color monitor.
NOTE: The video subsystem of your computer’s display may support video resolu-
tions that are not supported on an external monitor. When the video subtests are run
on an external monitor, some of the test screens may flicker and appear to malfunc-
tion. This condition does not affect the accuracy of the video subtests or indicate a
hardware problem.
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Many of the symptoms that would prompt you to run a subtest in the Video test
group are obvious, because the display is the visual component of the computer.
Before you run the Video test group or any of its subtests, you should make sure that
the problem is not occurring in the software or caused by a hardware change.