Question about KDS K717s 17" LCD Monitor

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KDS usa k717

Everytime i turn off the monitor and turn it back on i see lots of different lines with different colors and you can hear the monitor making sounds... and i have to like put a peice of cardboard behind the cover of the outer layer of the monitor and hit the screen for it to come on... can anyone help?

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  • Morph26 Jan 14, 2008

    I have the same issue, but at first I could temporarily fix the problem by switching the refresh rates back and forth from 60htz to 70htz to 75htz and back again. Unfortunately, it seems that the trick no longer works, and based on the advice of a friend of mine who is tech support, it has probably gone to the great display in the sky. If there is anyone with more info or a possible fix please let me know. thanks.

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Look at the capacitors on the power supply board. If any of the tops are not flat (raised) they are blown, replace them with similar values printed on the side. Also check the resistance between the legs of any transistor mounted to heat sinks, if you detect a short, reverse your leads, if the short is still there, replace the transistor.

Posted on Jul 16, 2008

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Look at the capacitors, if any of them have bulging tops, they are blown. Replace them with the same values written on the side. Ohm out transistors mounted on heat sinks, none should have a short. If you find a short, reverse your meter leads and see if the short is still there, if it is, replace the transistor.

Posted on Jul 16, 2008

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What to do about a power supply problem in the monitor?

Posted on Feb 21, 2008

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I have solved this for other LCD monitors, and have worked with other problems on this model. Most likely, the VGA signal is not reaching the controller chip intact. This will cause the mode detection to select the wrong resolution or continuously switch resolutions. If colors are missing or wrong, and the image is otherwise correct, then it is with the 3 analog color signals: red, green, or blue. This does not sound like your problem, so I suspect one or both of the two digital timing signals: VSYNC or HSYNC. Here are the troubleshooting methods and solutions:
1) Try the monitor on another computer to confirm a monitor problem!
2) Use a different VGA cable, in case it has an intermittent wire, or a bad connection.
3) Check to make sure that the light remains green. If off, the power supply is bad. If amber, the computer is not generating a signal, or the VSYNC and HSYNC are not arriving in the monitor.
4) If none of the above solves it, you will need to open the monitor. This is tricky. Remove the power cord. Remove the 4 philips screws on the bottom of the panel. Try to free the 3 "L" hooks on each side by pushing the bezel toward the top. You will probably need a thin and wide flat blade screwdriver to pop the case. Start sliding under the bezel from the bottom of the right hand side until it catches. A light twist will separate it. Slide up to next catch.
5) With power cord out, and bezel off, check the 15 pin VGA connector for corrosion and solder joints. Clean, replace, or resolder, as necessary. You can also check the cable from the VGA connector to the board.
Hopefully, this should allow you to fix the problem.

Posted on Jan 24, 2008

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