Video Test Group; Subtests - Dell PowerEdge 6350 Installation And Troubleshooting Manual

5-16 Dell PowerEdge 6350 Systems Installation and Troubleshooting Guide
The speaker no longer functions. The problem could be a failure of the system
timers as well as a failure of the speaker itself. Run the System Timers Test,
followed by the System Speaker Test.
A peripheral device appears to malfunction. Run the Interrupt Controllers Test.
A spreadsheet program or other type of mathematical application runs abnor-
mally slow, generates error messages concerning calculations or operations, runs
incorrectly, or generates incorrect results, or a proven piece of the program
appears to malfunction and you confirm that the software itself is not at fault.
(You can confirm that the software is not at fault by moving the program to
another computer and running it there.)
The computer periodically locks up, especially at different places and times in dif-
ferent programs.
The computer halts in the middle of performing calculations or complex mathe-
matical operations.
The subtests in the Video Test group verify the proper operation of the video control-
ler 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 tests all the video memory and provides additional subtests to
test the color features of a color monitor.
The eight subtests in the Video Test group and the video functions they test follow:
Video Memory Test
Checks the read/write capability of video memory in various video modes.
Video Hardware Test
Checks the cursor registers and the horizontal and vertical retrace bit registers in
the video controller.
Text Mode Character Test
Checks the video subsystem's ability to present data in text modes.
Text Mode Color Test
Checks the video subsystem's ability to present color in text modes.
Text Mode Pages Test
Checks the video subsystem's ability to map and present all available video pages
on the screen, one page at a time.