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Monitor goes black after 3 seconds. all connections are fine. will come back on for 3 seconds when I turn it off then back on, but then it just goes out again
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• 1) TAKE OUT YOUR LAPTOP BATTERY • 2) REMOVE YOUR AC ADAPTOR CORD, that's the wall power, remove it. • 3) NOW HOLD DOWN THE POWER BUTTON FOR 30 SECONDS.
That will drain any static electricity that has built up on your laptop
system board and many times fixes the problem of a black screen. After
the 30 seconds re-connect your laptop to the wall power and hit the
power button normally and see if the laptop comes back up.
Sounds like either there is a bad connection from the computer to the monitor, or the monitor has a faulty power regulator, causing the monitor to overheat prematurely, and shut off.
Could be a power issue. If it doesn't show anything at all then that may be the case. It may also be the display itself. It would be a costly repair so you might be better off finding a new monitor.
Try swapping the monitor cable from the working monitor to the other video connection on your computer. Effectively reversing the connections to isolate whether your problem is the video card in your computer or the monitor itself. If you find the working monitor displaying similar symptoms, then check your video drivers and ensure that you have all power saving features, screen savers, etc... turned off.
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