Question about Compaq QVision 171FS (White) 17 in.CRT Conventional Monitor

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My screen doesent fit and it is hourglass shaped it is driving me nuts

My screen appears hour glass shaped and not all the way full. the control buttons on the front are not doing anything I wonder if it it broken or am i an idiot.

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  • Anonymous Apr 16, 2009

    My picture is bowed in on the sides (hourglass shape). I took the back off the tv and noticed some broken pieces of plastic. After searching I found that they went to the back of the tube and they held the "color alignment rings?" in place. since the tabs were broken the rings or dials moved. I noticed that they were marked with a marker or some type of ink and realigned the rings to the marks and it realigned the color on the screen for the most part. However where the screen is streched at the corneres, the color is still not aligned.

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The problem is called "pincushion distortion" and happens because of the way CRT monitors work. There is circuitry in the monitor to correct the display, but it's not working in your monitor. Often this is because of bad solder connections to transistors in the circuit (they get pretty hot sometimes and can cause the connections to degrade). It can also be due to failure of those parts.

If you are comfortable working with electronic soldering and want to try your own repair, open the monitor and examine the board for bad connections. Repair any that are grainy or obviously cracked. Typically the parts that need resoldering are mounted on metal heatsinks so you have a place to start looking.

I don't recommend paying a shop to repair this. New 17-inch LCD monitors are so inexpensive today that it's better just to replace the CRT one.

Posted on Apr 17, 2009

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