After having the television on for a while (sometimes minutes, sometimes hours), the top and bottom of the picture will suddenly pinch in toward the middle and create an image with green and red ghost images, similar to looking at a 3D screen with no glasses
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Re: Samsung HCN4226W "image pinching"
The convergence IC has gone out and is located on the Main bd or the Power supply bd depending on the specific model and must be replaced and a Full convergence alignment must be performed to return your tv to a watchable condition. Only a Samsung trained tech can do this.
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This tv have convergence problems.Ur tv convergence board the 2 STK convergence ICS are defective,and some or all it resistor are dead.Try website like Tvrepairworld.com to buy a whole refurbish convergence board for the replacement.Spend about $100 dollars more this tv can be save.
Samsung parts for convergance problem http://www.partstore.com/Part/Samsung/Samsung/BP9500142E/New.aspx This convergence board works with the following Samsung television models: HCM4215W, HCN529WX, HCN559WX/XAA, PCN5425R, HCN4226WX, HCN529WX/XA Convergence amp ic bad http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html http://www.hdtvoice.com/voice/showthread.php?t=28929
I don't think the set will allow resizing in DVI mode, at least mine never has. I have to switch to the video input or S video to get that to work. I think there is something in the manual about that. On mine, the component input will not work if you have the DVI connected. If you have DTV, try resizing the image on the satellite receiver's remote. Sometimes, in the DVI mode, that works. I am about to pitch this set of mine out, as it now has fried something in the convergence system and won't work at all, so if the new convergence board I have ordered wont fix it, its going up on Ebay for parts !