Compaq 1592DMT Compaq Armada 1500 Family of Personal Computers Maintenance and - Page 56

Table 3-28 Solving Screen Problems Problem Probable Cause Solution(s) Characters are dim. Screen is blank. The brightness or contrast (if applicable) control is not set properly. Computer screen is in direct light. Display is damaged. You initiated QuickLock/ QuickBlank. You may have another screen blanking utility installed. Screen save was initiated after the Power Management timeout period of inactivity If an STN screen is used, brightness/ contrast needs adjusting. Screen has overheated Suspend was initiated. Computer screen is blank and the screen on an external monitor displays information. Screen is blank and the power/suspend light is blinking Display was switched to the external monitor. System is in Suspend Screen is blank, the power/ suspend light is blinking, and the battery light is blinking System has entered a low-battery condition External monitor does not display information External monitor was connected after the computer was turned on The external monitor signal cable or power cord is not properly connected. Distorted or garbled characters The ANSI.SYS driver is not in the on the screen are mixed with text. CONFIG.SYS file or the path is incorrect. Garbled characters on internal You are using 800 × 600 or higher display or flashing internal display resolution on external display and when connected to external have toggled back to internal display, monitor. which only supports 640 × 480 resolution. The image on the external You are using an external monitor monitor does not fill the screen. and simultaneously displaying an image on the computer display. Small red, green, or blue spots appear on the computer TFT display. Small spots, called on-pixels, often appear on TFT screens. Compaq limits the number of these on-pixels to 0.003% of the approximately 1 million transistors that are on a 12.1-, or 11.3-inch display. When in MS-DOS mode, To maintain a high-quality image, the the image on the computer 800 × 600 models do not display does not fill the screen. stretch the lower-resolution When displaying simultaneously, image of MS-DOS mode to fill the the image on the external screen. monitor may not be centered. Adjust the control(s)using Fn+F9 (contrast) and Fn+F10 (brightness). Tilt the display or move computer. Replace the display. Enter the password to exit QuickLock/QuickBlank. Press any key and/or enter the password. Press any key or click the mouse. Use the hotkeys to adjust the brightness/contrast. If the computer is in direct sunlight, move it an allow it to cool. Press the suspend button to exit Suspend. Press the Fn+F4 hotkey to display information on the computer screen. Press the Suspend button to exit Suspend. Enter the power-on password if prompted. Immediately connect the computer to an external power source or replace the battery pack. Press the Fn+F4 hotkey to switch to the external monitor Verify the cables are properly connected. Add the ANSI.SYS driver to the CONFIG.SYS file. Add the following line: DEVICE=C:\ANSI.SYS Restart the computer. If simultaneous display is desired, use 640 × 480 resolution. This is typical; no action is required. This is typical; no action is required. This is typical; no action is required. Troubleshooting 3-29