Acer 1911 Standard Timing Table, Troubleshooting, Problem Picture is unclear and unstable

Standard Timing Table

If the selected timing is NOT included in table below, this LCD monitor will use the most suitable available timing.

Resolution		H. Freq.		V. Freq.		Pixel Freq.		H/V Sync.		Mode
		(KHz)		(Hz)		(MHz)		Polarity
640 x 350		31.469		70.087		25.175		+/-		VGA-350
640 x 400	24.830		56.420		21.050		-/-		NEC PC9801
640 x 400	31.469		70.087		25.175		-/+		VGA-400-GRAPH
640 x 400	31.50		70.15		25.197		-/-		NEC PC9821
640 x 480	31.469		59.940		25.175		-/-			VGA-480
640 x 480	35.00		66.67		30.24		-/-			APPLE MAC-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	35.156		56.250		36.000		+/+		SVGA
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
832 x 624	49.725		74.55		57.2832		-/-			APPLE MAC-800
1024 x 768	48.363		60.004		65.000		-/-			XGA
1024 x 768	53.964		66.132		71.664		+/+		COMPAQ-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
1024 x 768	60.04		75.02		80.00		-/-			APPLE MAC-768
1280 x 1024	63.981		60.020		108		+/+		SXGA
1280 x 1024	79.976		75.025		135		+/+		SXGA

Note: 1.When the in put display mode is not 1280 x 1024, the image is smoothly expanded to 1280 x 1024 dots with the PW164 scaling engine. After expansion from 650x350, 640x400, 640x480, 720x400, 832x624, 800x600, and 1024x768 resolution, the text may look not so sharp, and the Graphics may look not so proportional.

2. 640x400 56Hz and 1024x768 66Hz modes cannot be supported when Digital (TMDS) input.

Troubleshooting

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: 24 ~ 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

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