IBM 86884RX Maintenance Manual - Page 63

Subtest Pixel Throughput Description 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 320 x 200 Graphics Test 640 x 200 Graphics Test 640 x 350 Graphics Test 640 x 480 Graphics Test Test Description Type of Monitor 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. 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 Displays a 16-color screen, then fills the screen with random colors, then returns to a blank screen. EGA and VGA adapters only. 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