Compaq 4150T, 4130T, 4140T, 4131T, 4200, 4125T, 4160T SLIMLINE, 4120, 4125D Solving Screen Problems

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Table 2-28

Solving Screen Problems

Problem	Probable Cause	Solution(s)
Characters are dim.	The brightness or contrast	Adjust the control(s)using Fn+F9
	(if applicable) control is not	(contrast) and Fn+F10 (brightness).
	set properly.
	Computer screen is in direct light.	Tilt the display or move computer.
	Display is damaged.	Replace the display.
Screen is blank.	You initiated QuickLock/	Enter the password to exit
	QuickBlank.	QuickLock/QuickBlank.
	You may have another screen -	Press any key and/or enter the
	blanking utility installed.	password.
	Screen save was initiated after	Press any key or click the mouse.
	the Power Management timeout
	period of inactivity
	If an STN screen is used, brightness/	Use the hotkeys to adjust the
	contrast needs adjusting.	brightness/contrast.
	Screen has overheated	If the computer is in direct sunlight,
		move it an allow it to cool.
	Suspend was initiated.	Press the suspend button to exit
		Suspend.

Computer screen is blank and the screen on an external monitor displays information.

Display was switched to the external monitor.

Press the Fn+F4 hotkey to display information on the computer screen.

Screen is blank and the	System is in Suspend	Press the Suspend button to exit
power/suspend light is blinking		Suspend. Enter the power-on
		password if prompted.

Screen is blank, the power/ suspend light is blinking, and the battery light is blinking

System has entered a low-battery condition

Immediately connect the computer to an external power source or replace the battery pack.

External monitor does not	External monitor was connected	Press the Fn+F4 hotkey to switch to
display information	after the computer was turned on	the external monitor

The external monitor signal cable or power cord is not properly connected.

Verify the cables are properly connected.

Distorted or garbled characters	The ANSI.SYS driver is not in the	Add the ANSI.SYS driver to the
on the screen are mixed with	CONFIG.SYS file or the path is	CONFIG.SYS file. Add the following
text.	incorrect.	line: DEVICE=C:\ANSI.SYS
Garbled characters on internal	You are using 800 × 600 or higher	Restart the computer. If
display or flashing internal	resolution on external display and	simultaneous display is desired, use
display when connected to	have toggled back to internal	640 × 480 resolution.
external monitor.	display, which only supports
	640 × 480 resolution.
		Continued

Troubleshooting 2-29