Question about Acer AL1716 17" LCD Monitor
I HAVE AN ACER AL 1716 FLAT SCREEN MONITOR. WHEN I BOOT UP THE COMPUTER, THE SCREEN LIGHTS UP WITH ABOUT 50 VERTICAL LINES IN ALL DIFFERENT COLORS. IT DOES THIS FOR A FEW SECONDS AND THEN YOU EVENTUALLY SEE THE "DESKTOP" BUT IT LOOKS LIKE THE DESKTOP IS GOING 100 MPH BOTH VERTICALLY & HORIZONTALLY. THIS MONITOR WAS ORIGINALLY OWNED BY THE COMPANY THAT I WORK FOR AND WHEN IT STARTED DOING THIS, THEY DECIDED TO REPLACE IT AND SAID I COULD HAVE IT SO I TOOK IT IN HOPES I COULD REPAIR IT.
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.
Posted on Mar 28, 2008
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Posted on Jan 02, 2017
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