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Subtest
Description
Pixel
Throughput
Reports
the
speed
at
which
complex
patterns
are
drawn
on
the
screen.
These
video
tests
might
not
appear
correctly
when
displaying
high-resolution
VESA
video
modes
on
a
multisync
monitor.
The
monitor
must
be
adjusted
for
each
individual
video
mode.
After
the
video
mode
you
will
be
using
appears,
you
must
run
the
Aspect
Ratio
and
Display
Centering
subtest
to
center
the
monitor.
The
graphics
mode
tests
are:
Test
Name
Test
Description
Type
of
Monitor
320
x
200
Graphics
Test
Displays
a
black
and
white
9
x
13
window
and
redisplays
it
in
reverse
video.
Then
displays
a
three-color
screen,
a
screen
of
random
colors,
then
a
black
and
white
screen,
and
finally
256
colors
All
color
monitors.
640
x
200
Graphics
Test
Displays
three
black
and
white
boxes,
then
goes
from
a
black
screen
to
a
white
screen,
and
back
to
a
black
screen.
All
color
monitors
640
x
350
Graphics
Test
Displays
a
16-color
screen,
then
fills
the
screen
with
random
colors,
then
returns
to
a
blank
screen.
EGA
and
VGA
adapters
only.
640
x
480
Graphics
Test
Displays
a
16-color
screen,
then
fills
the
screen
with
random
colors,
then
returns
to
a
blank
screen.
Only
VGA
adapters.
Video
Controller
Test
This
test
verifies
the
functionality
of
the
graphics
controller
in
VGA
mode.
The
video
controller
test
verifies
vertical
synchronization,
horizontal
synchronization,
the
graphics
controller,
the
attribute
controller,
and
the
DAC
register.
USB
diagnostic
tests
The
USB
tests
diagnose
problems
with
USB
devices.
For
the
USB
test
error
codes,
see
“USB
test
error
codes”
on
page
167.
USB
Functionality
Test
Select
USB
Test
from
the
USB
menu
to
diagnose
problems
with
USB
devices
and
to
make
sure
that
USB
support
is
provided
in
the
SAL/EFI.
USB
Keyboard
Test
Use
this
test
to
diagnose
USB
keyboard
hardware
functionality
and
to
determine
the
data
transfer
rate
between
the
USB
host
controller
and
the
USB
keyboard.
This
procedure
tests
the
USB
keyboard
key
codes
and
keystrokes.
Chapter
3.
Diagnostics
53