My Acer AL 1912 started having bad colors and a shaky screen. The colors seem washed out. It is not the video card, the computer, or the settings. It does it no matter what after about 1 minute. I want to open it and replace parts but what part might it be?
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Graphics cards on laptops generally are a part of the motherboard. It may not be the graphics card however in your case. It could be a screen or cable. If there are lines on the screen / no video / or distorted colors, it will require a technician to open the laptop and perform evasive work. If it is truly a bad graphics card, then the best option may be to purchase a different laptop altogether.
When you say other monitor I'm assuming you are talking about an external monitor attached to the laptop? If so then you are correct if it shows the same as the monitor that is in the laptop, you have a graphics video card problem.
[u][b]LCD Monitor Shadow Effect[/b][/u]
This problem is best described as the LCD monitor "Shadow Effect". The solution to this very simple. No software or hard ware changes required. The cables that are connected to the LCD monitors are causing the problem. Its also called as electromagnetic noise or electrical noise. [u][b]Solution: [/b][/u]Keep the two cables - (power cable and moitor display cable), that are connected to the LCD monitor as far away as possible with each other and also away from other electrical cables.
Thats it. Your shadow effect is fixed.
Try looking at the LCD screen at a sharp angle to see if ghost-like video can be seen during the 'off' time of the flicker.
If video is still present even though not that visible, then either the backlight or its power supply are failing.
The color problem could also be caused by a backlight lamp that is not ionizing completely.
Lines caused by a bad LCD screen and lines caused by poor sync.
A bad LCD will cause perfectly straight vertical and horizontal lines that don't move at all. This is because the row and column addressing ICs have gone bad, so you will end up with rows or columns of bad pixels.
Poor sync looks more like what you are describing. The picture will flip vertically and horizontally.
Poor or missing sync can be caused by a bad video cable, or a bad IC on the main board.
If the monitor has a removable video cable, borrow another one from a friend to test if the monitor is working. If it works, head to your local computer store and buy a new cable. If the monitor still doesn't work with a different cable, you may have a bad main board. The only way to repair the monitor will be to replace the board.
If you open the monitor, be sure to check for bad capacitors. They can cause all sorts of strange faults. Look elsewhere on this site for how-tos on inspecting capacitors.
If your video cable is not removable, there's not much you can do. You will need a way to test that each pin on the cable connector on the main board conducts to a corresponding pin on the other end of the cable. You can do this if you have a multimeter, or a continuity tester.