ACER AL 1716
There are two types of lines.
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.
Mar 28, 2008 |
Acer AL1716 17" LCD Monitor