KDS 190is Monitor snapping sounds and zooms in/out
I've got a KDS 190is CRT monitor, its got low hours, maybe a few hundred hours or so of use on it. It began making clicking or snapping sounds, at which time the picture will zoom in all at once and flash to black, then be OK for a while. There's no time pattern to when it does it, but bright screens seem to affect it more. It don't do it when just on the desktop, which I have set as all black and no icons showing. If I open a picture, it will do it seconds after the screen lights up. Turning off the monitor and letting it cool makes no difference, but I do here the same snapping sounds as the monitor goes off, sometimes even a minute or two after it's gone black too. I had another one do the same thing, it finally threw sparks out the side and died completely. I unhooked this one till I can either fix or replace it. I hate to trash a monitor that has such little use and one that gives such a good picture.
My monitor worked one day - gone the next. Nothing on the screen except a bright green glow. No tech support for this problem. They want $70. just to look at it.
if you look closely can you see a very dark image on the screen? your problem is usually the result of the backlight on its way out, these are very hard to replace so you will need to take it to a profesional, in most cases it is cheeper to buy a new screen.
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is this a crt monitor or a lcd monitor? if it is a lcd monitor then your problem is a bad back light power inverter board and needs to be replaced. if it is a crt monitor then check the brightness and contrast controls on the crt monitor. also check to make sure that the display are compatible with the crt monitor as well! meaning that if the crt monitor's max resolution is 1024x768 and your video card is set to a higher setting then you will get a blank screen with a sometimes green power light, maybe flashing. be very careful though because may also damage the crt monitor. also check your video card setting to make sure it is at 50 hz or 60 hz some crt monitors don't like the higher vertical refresh rate. one last thing is the age of the crt monitor, it may be on its last leg of life. when i worked at a monitor repair center a few moons ago there was a life expectancy of maybe 30,000 hours(?) on a crt(note: it's been awhile so please don't quote me on this life expectancy!) you may get eye strain with higher than 60hz range.
Most monitors (among the ~2000 I have repaired) have either four screws at the extreme corners accessible from the rear or only two with the other opposing edge snapped in.
Some monitors, will have and extra 1 or 2 screws around the area where the connections are made while others may have only snap-in molded tabs that must be released with a flat-blade screwdriver.
Before bothering the monitor, I recommend you substitute another monitor to ensure that the monitor is receiving the signal inputs it needs to function.
Loose connectors and failed video sections can also be the cause as well as a 'lost' driver that Windows has corrupted.
I also suggest you leave the monitor unplugged from the AC ine overnight since there are components that can retain hundreds of volts of charge for hours and deliver as really unpleasant shock if you tangle with one of these points.
If the high voltage (horizontal) section is still active, it can deliver around 25,000 volts with enough power to punch a hole through your thumb.
A primitive check for the operation of the high voltage is to hold an AM band radio at various points of the housing.
If you get squeals, the horizontal section is at work.
First try moving speakers away from monitor a bit. Some speakers magnets actually reduce the life span off monitor. I hope I am wrong but usually a high pitch whine is the High voltage Transformer. Costs more than the monitor. All you can do is continue use till it goes. Speakers usually deteriorate the tube itself. HVT are just one of those parts that go due to use. Hope it gives you more enjoyment before it goes. Good luck and try to have a good day.
Just fixed mine. Maybe it's a few years late. Hope you guys still have the display. It's the power supply board. I've just replaced 4 bulge capacitors near one edge of the PS. They are 2x1000uF 10V, 1x470uF 25V & 1x470 10V. I salvaged my parts from an old CRT monitor. Hey you can go green with your repairs too!
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