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My monitor acer AL 1916W when I put it on it blinks green and yellow while display is black. What could be the problem?

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Try a different monitor, or a different computer with the same monitor. Also, try a different cable. – choroba May 2 '13 at 9:48

Those monitors have a reputation for failing capacitors. Try it on a different computer first, but if that doesn't work it's probably dead.

If you've got a soldering iron, you can probably resurrect it cheaply by replacing the affected capacitors. Have a look at these instructions:

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