Troubleshooting

timing.
	Resolution		H. Freq.		V. Freq.		Pixel Freq.		H/V Sync.		Mode
	Resolution		(KHz)		(Hz)		(MHz)		Polarity		Mode
			(KHz)		(Hz)		(MHz)		Polarity
	640 x 480		31.469		59.940		25.175		-/-		VGA-480
	640 x 480	37.861		72.809		31.500		-/-			VESA - 480 - 72Hz
	640 x 480	37.500		75.000		31.500		-/-			VESA - 480 - 75Hz
	720 x 400	31.469		70.087		28.322		-/+			VESA-400-TEXT
	800 x 600	37.879		60.317		40.000		+/+		VESA-600-60 Hz
	800 x 600	48.077		72.188		50.000		+/+		VESA-600-72 Hz
	800 x 600	46.875		75.000		49.500		+/+		VESA-600-75 Hz
	1024 x 768	48.363		60.004		65.000		-/-			XGA
	1024 x 768	56.476		70.069		75.000		-/-			VESA-768-70 Hz
	1024 x 768	60.023		75.029		78.750		+/+		VESA-768-75 Hz
	1280 x 1024	63.981		60.020		108		+/+			SXGA
	1280 x 1024	79.976		75.025		135		+/+			SXGA

Note: When the in put display mode is not 1280 x 1024, the image is smoothly expanded to 1280 x 1024 dots with the PW131 scaling engine. After expansion from 640x480, 720x400, 800x600, and 1024x768 resolution, the text may look not so sharp, and the Graphics may look not so proportional.

This LCD Monitor has pre-adjusted using factory standard VGA timings. Due to the output timing differences among various VGA cards in the market, users may initially experience an unstable or unclear display whenever a new display mode or new VGA card is selected.

Attention

This LCD Monitor Supports Multiple VGA Modes.

Refer to the Standard Timing Table for a listing of modes supported by this LCD Monitor.

PROBLEM Picture is unclear and unstable

The picture is unclear and unstable, please perform the following steps :

1.Enter PC to “Shut Down Windows” status while you’re in MS-Windows environment.

2.Check the screen to see if there’s any black vertical stripes appear. If there are, take advantage of the “Clock” function in OSD menu and adjust (by increment or decrement numbers) until those bars disappear.

3.Move to “Phase” function in OSD menu again and adjust the monitor screen to its most clear display.

4.Click “No” on “Shut Down Windows” and back to the normal PC operating environment.

PROBLEM There is no picture on LCD Monitor

If there’s no picture on the LCD Monitor, please perform the following steps:

1.Make sure the power indicator on the LCD Monitor is ON, all connections are secured, and the system is running on the correct timing. Refer to Chapter 3 for information on timing.

2.Turn off the LCD Monitor and then turn it back on again. If there is still no picture, press the Adjustment Control button several times.

3.If step 2 doesn’t work, connect your PC system to another external CRT. If your PC system Functions properly with a CRT Monitor but it does not function with the LCD Monitor, the output timing of the VGA card may be out of the LCD’s synchronous range. Please change to an alternative mode listed in the Standard Timing Table or replace the VGA card, and then repeat steps 1 and 2.

PROBLEM There is no picture on LCD Monitor

If you have chosen an output timing that is outside of the LCD Monitor’s synchronous range (Horizontal: 30

~80 KHz and Vertical: 56 ~ 75 Hz), the OSD will display a “Out of Range” message. Choose a mode that is supported by your LCD Monitor.

Also, if the signal cable is not connected to LCD monitor at all or properly, the monitor screen will display a message “No Input Signal”.

AL1931 specifications

The Acer AL1931 is a versatile and efficient LCD monitor designed for both casual users and professionals who value performance and clarity in their visual displays. Released as part of Acer's reliable AL series, this monitor has garnered attention for its commendable specifications and user-friendly features.

The AL1931 boasts a 19-inch screen size, which makes it an ideal choice for home, office, or gaming environments. With a resolution of 1280 x 1024 pixels, it delivers vibrant image quality and sharp text, well-suited for various applications ranging from word processing to graphic design. The monitor’s aspect ratio of 5:4 ensures a balanced viewing experience, particularly beneficial for users who frequently work with documents and spreadsheets.

One of the standout features of the Acer AL1931 is its fast response time, clocking in at just 5 milliseconds. This quick response ensures that there is minimal motion blur, making it suitable for fast-paced video gaming and action-packed movies. The monitor also offers a brightness level of 250 cd/m², providing ample illumination for both indoor and dimly lit settings.

The AL1931 utilizes LCD technology, which is known for its power efficiency compared to traditional CRT monitors. With a low power consumption rate, it not only helps reduce electricity bills but also contributes to a greener environment. Additionally, the monitor features a contrast ratio of 700:1, enhancing the differentiation between light and dark images, thus improving overall picture quality.

Connectivity is a vital aspect of modern monitors, and the Acer AL1931 excels in this regard. It comes equipped with a VGA input, ensuring compatibility with a wide range of computers and devices. The monitor’s ergonomic design is another highlight, featuring tilt adjustment to help users find their desired viewing angle with ease.

Overall, the Acer AL1931 stands out for its reliable performance, solid build quality, and user-centric features. It caters well to a variety of users, providing excellent visual output for both entertainment and productivity purposes. With its thoughtful design and practical specifications, the AL1931 remains a commendable choice in the realm of affordable LCD monitors.

Resolution

H. Freq.

Pixel Freq.

H/V Sync.

Mode

VESA-400-TEXT

XGA