Usb Diagnostic Tests - IBM eServer xSeries 455 Type 8855 Hardware Maintenance Manual And Troubleshooting Manual

Graphics mode tests: Use the graphics mode tests to make sure that graphics
display correctly. The following subtests appear in all Graphics Mode Tests (320 x
200, 640 x 200, 640 x 350, 640 x 480):
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 shown in the following table:
Video Controller Test
This test verifies the functionality of the graphics controller in VGA mode and the
video memory. 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 184.
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IBM xSeries 455 Type 8855: Hardware Maintenance Manual and Troubleshooting Guide
Subtest
Text and Attribute Test
Grid Test
Aspect Ratio and Display
Centering
Circular Pattern Test
Resolution
Animation and Flicker
Pixel Throughput
Test Name Test Description
320 x 200 Displays a black and white 9 x 13 window and
Graphics Test 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
640 x 200 Displays three black and white boxes, then
Graphics Test goes from a black screen to a white screen,
and back to a black screen.
640 x 350 Displays a 16-color screen, then fills the
Graphics Test screen with random colors, then returns to a
blank screen.
640 x 480 Displays a 16-color screen, then fills the
Graphics Test screen with random colors, then returns to a
blank screen.
Description
Makes sure all characters are displayed in the proper
color.
Verifies the graphic dot spacing for each mode.
Centers the monitor display.
Centers the monitor display.
Reports the screen resolution.
Reports the video controller speed.
Reports the speed at which complex patterns are
drawn on the screen.
Type of Monitor
All color monitors.
All color monitors
EGA and VGA adapters
only.
Only VGA adapters.