Question about Samsung Projection Televisions

3 Answers

We have an HL-T5676S HDTV that we purchased in Sept. last year. We have Comcast Cable w/ the HD box. We also have several game systems we play on the TV. They are a Wii, XBOX 360 and a PS2. We also have a Toshiba HD DVD player, model HD-A3KU that is connected to the TV. All the components are seperately connected, in other words none of them are routed through the cable box but connect directly to the TV. The problem we're having is there are very disinct horizontal lines covering the screen top to bottom and side to side. They started about 2 months ago and have been intermitent. The picture is barely visible through the lines. We purchased the TV through Best Buy. Initially, when we contacted Best Buys' service department they suggested unplugging all the external components. This made the lines go away for a short time but they came back and then unplugging the components no longer solved the problem. We have unpugged the TV and let it sit for a few minutes and then plugged it back in again with no change in the picture. We even left the TV on for about two days straight and the lines finally went away but soon returned. At that time we made a service appointment but the earliest one was 2 weeks away. By the time the appointment day arrived, the lines were gone. Now it's 3 weeks later and the lines are back with no change after unplugging all components except the cable box. We have scheduled another service call but, again, it's almost 2 weeks away and we don"t have the use of our TV. Is this a problem with the TV or something to do with one of our components? We'd like to solve this problem once and for all. Any light you could shed on this problem would be greatly appreciated.

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  • 3 more comments 
  • dacbird Jun 29, 2008

    Firstly, no, there are no speakers next to the TV. And I agree this is something for the pros if it involves replacement parts. The TV is still covered under our service aggreement through Best Buy. I was hoping it was something that we were able to do on our end before the service call that's 2 weeks away.

  • dacbird Jun 29, 2008

    I'm having trouble seeing all of the responses for some reason. Please be patient with me while I try to access them. Thanks.

  • dacbird Jun 29, 2008

    I wonder what's the chances that the "Geek Squad" is gonna find this problem?

  • dacbird Jun 29, 2008

    We'll do. Thanks for all your help.

  • dacbird Jun 30, 2008

    I tried leaving a "problem fixed" rating as you suggested but when I roll my cursor over the "rate" bullet in the text I get a pop-up ad for an online trading website. It makes leaving a rating impossible (for me anyway) and I can't make it go away so I hit the icon with the 4 blue squares on it. Hope this gets the job done. I didn't know if you were aware of this situation or not. Seems a little contrary to leaving a positive comment to your efforts to resolve my problem. Thank you again for your help. I really do appreciate it.

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3 Answers

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  • Master
  • 848 Answers

Check the contacts on the PCB or yoke connectors or isolation / connectivity problems inside the yoke

Posted on Jun 29, 2008

  • gopinath pasupathy Jun 29, 2008

    the problem for horizontal lines maybe


    1. Power is failing to the horizontal output transistor - this could be due to a low voltage power supply problem, bad connection, etc.


    2. Base drive to the horizontal output transistor is failing - could be a fault in the horizontal oscillator or bad connection.


    3. Problem with the flyback transformer or its secondary loads (flyback may provide other power voltages).


    4. X-ray protection is activating - either due to excess HV or due to a fault in the X-ray protection circuitry.

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Replaced a capacitor at the back of the main board, next to the rear rca inputs. It is labeled 10uf 100v.Here are a couple of photos of the part.

http://farm4.static.flickr.com/3215/2337629026_eaa30cfa18.jpg?v=0

http://farm3.static.flickr.com/2411/2337627420_b45bbf1a74.jpg?v=0

Hope that helps.............

Posted on Jun 29, 2008

  • Mark Gil
    Mark Gil Jun 29, 2008

    If you're really think that it will be hard for you to repair this I really suggest you to let a professional do the job for you..

  • Mark Gil
    Mark Gil Jun 30, 2008

    You're very welcome ....

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  • 243 Answers

Is there anything magnetic near the tv thats interfering, You dont have like 15" unshielded cirwin vegas right next to the tv do you?

Posted on Jun 29, 2008

  • 4 more comments 
  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    But from what i read it could be a capacitor set for your samsung they are here the two stk set.
    if not you can order the ic replacement for this tv the kits are sold here.

    also
    another good link is electronix they also sell the capacitors and IC's
    and repair kits for your model. They have lots of good capacitation
    meters for a good price check it out here.

  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    heres a better link for the IC's.


    note this is a complicated fix so it is best left to professionals but if you have confidence in de-soldering the old IC's on a PCB board and soldering the new ones go for it.


  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    Interesting There is a few problems it could be from the IC's that are
    used for convergence and horizontal hold and vertical hold. could just
    need a manual alignment but youd want to change these capacitors. theres
    a capacitor at the back of the main board, next to the rear RCA inputs. Labeled 10uf 100v. heres what it may look like



    photo 1



    photo 2

    which you can purchase here through electronix.com i order through them for all my repairs of this nature.

    Also here is a look at how to change the IC if it is blown

    photo 3 of ic replacement


    photo 4 of ic replacement


    hope this helps you.

    Thanks Nate.


  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    No if i were you what i would tell them is to take a capacitation meter and test what ive showed you. Tell the service technician to tell you wether or not there faulty regardless if its happening. They may just need to be reseated on the board. But give him the information i have laid out for you.

  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    slim to none. Geek squad wow i dont even think they require a certification. just people that have general knowledge. That will be funny let me know how it goes.

  • Nathan Ayers
    Nathan Ayers Jun 29, 2008

    They send it out for service just like before they had geek squad. You should have inhome service where they pick it up and take it. Then most circuit city and best buy have replacement tv for like 5 dollars or something that you can use while its out of a floor model thats comparable to your own.

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