I have a Samsung HCN653W, which has worked great for the 5 years or so
that I've had it. Recently, the picture began flickering, then going
completely red (that is, you could still see the image, but everything
was in shades of red). Occasionally, the picture is fine, and then
will flash to red, and then sometimes it will come back to normal,
briefly flashing green in the process. We had a tech come out to try
repairing it, and he said that the lead to the green gun was loose, and
he re-soldered it. It worked great for about a week, and now we are
back to the same problem. It seems that walking near the TV or even an
upwards inflection in the voices of spmeone on the TV can cause the
picture to flicker. I plan to take it apart soon and look for more
loose connections. Does anyone have any suggestions for where I should
focus my search, and are there any special precautions to take (do I
need to discharge any of the CRTs to make these repairs)?
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HI, Green screens are almost always caused by no signal-so check the input connections: rca cable, screw on coax connector, make sure channel is right 3 or 4 for a vcr type connection, sometimes channel 60 for some types of satellites-new rca cable for other connection-can determine if the cables are good by connecting to known working equipment , and make sure the plugs on back of television aren't loose-they've been known to come loose inside from the circuit boards before. Hope this has been of use, good luck Prodzilla
I believe i have the same problem myself. When my TV is on any of the Component Inputs without my DVD player turned on i usually get the normal green screen. But now that is a dip in the green at the top of the screen from the top left to almost the top right and black pushing down on the dip. Almost like a green curtain was sagging at the top and you can see the black behind it. It does this on every input and distorts every picture you see. The distorted picture has all the green slightly off from where the rest of the picture is and where the dip at the top of the screen is there is somtimes purple instead of black.
I know the basics of how the picture gets onto the screen and its my guess that the Green "gun" for lack of a better term and somhow come loose, or been missaligned to a great extent. I would love to find an answer to this problem, and anyones best guess as to how much a repair man will charge, just so i know the ballpark.
ussally when u get coloerd outlined this idicates ether a convergence or a focuse problem.. the green convergence has become shifted. not lineing up with red and blue.. this also could indicate a green crt problem.. my advice is to get a tech to check it out.. it could be a simple adjustment or a whole new green crt
As you are not able to see red color on your monitor means you will be seeing
your problem is that red signal is not coming to red cathode of your crt.
1 connector loose(cpu to monitor)
2 crt base loose.
3 loose or print or dry near red cathode circuit
4 red video output.
5 red signal from processor to red video is missing
6 processor ic.
you are going to need to replace the convergence board assembly. It is available at http://www.samsungparts.com/part_detail.asp?catalog%5Fname=Parts+and+Accessories&product%5Fid=BP95%2D00142P&search%5Fmodel=HCN653W. Also get the service manual, as you will need to do some touchup convergence and reset the perfect focus setup again If you have the technical ability. If you do, great! If you do not, these service menu alighnments can mess up your set, so take no shortcuts. Good Luck
You weren't very specific about your problem, but assuming you've tried different inputs and tried messing with the convergence setting, it may indeed be the signal board, and you may need to have it replaced. BTW these sets also have an issue with the dynamic focus circuit and with crt fluid leakage. Make sure that you do not have a fluid on one of the crt boards. And as always with repairmen, a second opinion couldn't hurt.