Question about Samsung HCL4715W 47" Rear Projection Television

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Flashing red lines on Samsung hcl4715w rear projection

I bought a TV 3 days ago from craigslist and "all of a sudden" there are flashing red lines on the picture. I am wondering if there is an easy solution or simply what the problem might be. I appreciate any assitance. Thanks

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Re: Flashing red lines on Samsung hcl4715w rear...

The convergence board wont correct the problem. You need to replace the two Convergence ICs on the sub board STK392-040 and you will be back to normal. See my response above. That site will help you get it back to normal.

Posted on Apr 24, 2008

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Our samsung HCl4715W tv is all connected right but our picture is scrambled where you see double exposure and the color is off. Can not find our manual. any suggestions?

The problem of your tv is the convergence. Projection tv set has a 3 colors red,blue and green this 3 colors must be properly lined up to look the video normal. When this 3 colors is not properly aligned the video will produce a double image of color or like a 3d or wavy. In order to fix this problem you should adjust it in the menu program of your tv you should move any of the colors to up or down, left or right if you cannot align the 3 colors the problem is the convergence ic it must be replace. To locate the convergence ic you should remove the back cover of your tv but be sure to unplug your tv, you will see this ic attached in a large aluminum plate it has a marking of stk--- and followed by a numbers. or you could contact a service technician do do it for you and save you from stress. Good day and best regards.

Jul 17, 2011 | Samsung HCL4715W 47" Rear Projection...

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Power light is on T.V. is not responding

u may have a bad convergence board stk392-040

Apr 30, 2009 | Samsung HCL4715W 47" Rear Projection...

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Power light flashing

unplug the convergence yokes then try powering up the set. If it powers up the ICs are bad.

Jan 29, 2009 | Samsung HCL4715W 47" Rear Projection...

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Blue CRT issues?

Yes the puddle is related to the Blue CRT coolant leaking. You are most likely going to need a new Blue CRT drive circuit board and quite possibly a new Blue CRT if the CRT got too hot from not haveing a sufficent supply of coolant. You can get replacement CRT drives and CRts at the following link.

Jan 15, 2009 | Samsung HCL4715W 47" Rear Projection...

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All screen is red


Nov 19, 2008 | Samsung HCL4715W 47" Rear Projection...

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Samsung HCL4715W

It is very possible that there are some parts in the power supply that are failing. This can be from voltage regulation, filtering, or noise problems.

Jerry G.

Jul 08, 2008 | Samsung HCL4715W 47" Rear Projection...

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Flashing Horizontal, Circuluar, Colored Lines

sounds like bad capacitors on the FMT board need replacing that is a common fault with the first generation DLPs There are 3 bad capacitors.

May 31, 2008 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

TV Flickers red lines across tv screen

Sounds like you have an intermitant overdrive situation on the red CRT. This could be caused by a bad component on the Red CRT board, an intermittantly shorting CRT or the circuitry in the main board. You should not run it until the problem is resolved as you could damage the CRT if it is not already bad. This is something that unless you are a qualified tech you are not going to have any success resolving. It should not be very hard for a good tech to diagnose the problem. Costs will depend on the part which is bad. If it is the red CRT it probably is not worth fixing, but it could be a 50 cent capacitor. Certainly worth the cost of a service call. Good luck.

Jun 29, 2006 | Samsung HCL4715W 47" Rear Projection...

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