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No picture on sylvania 15" lcd tv

The TV has sound but no picture. The LCD screen illuminates but it has no detail.
There are some color stripes running vertically on the screen.When you press a menu button the stripes move but you get no menu

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  • imgone1 Jan 20, 2009

    the model # is sylvania 6615lf

  • imgone1 Jan 20, 2009

    The TV has sound but no picture. The LCD screen illuminates but it has no detail.
    There are some color stripes running vertically on the screen.When you press a menu button the stripes move but you get no menu. the model # is sylvania 6615 LF

  • imgone1 Jan 21, 2009

    The TV has sound but no picture. The LCD screen illuminates but it has no detail.
    There are some color stripes running vertically on the screen.When you press a menu button the stripes move but you get no menu. the model # is sylvania 6615 LF

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6 Answers

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  • Flat Panel T... Master
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Question: "The TV has sound but no picture. The LCD screen illuminates but it has no detail.
There are some color stripes running vertically on the screen.When you press a menu button the stripes move but you get no menu."

Answer : most common reason for vertical stripes on screen on an LCD TV or Monitor is a bad LCD ribbon cable or connector.

The TV must be tested with a replacement LCD cable, or the cable tested for continuity using a multimeter.

On few models LCD controller is directly connected to display, in that case, check LCD controller connection to display panel.

If the cable is fine, then as already stated the problem is a bad video chipset on LCD controller board.
The controller board is not serviceable, and when this happens the board must be replaced.

Here the replacement board: 6615LF4

Call the seller to get a replacement cable set.

Or get in touch with Sylvania customer support and ask part price, or availibility of extended warranty.


Posted on Jan 21, 2009

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  • Master
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There are several possibilities.
It is possible one of the internal fuses blew out.
It could be a bad horizontal outut transistor.
It could be a bad secondary of the power supply went bad
And many other things.
If it's just a fuse, it won't cost much, but a lot of them do not look like you would expect a fuse to look like.It might be a little yellow, green, or gray rectangualar box shaped part.

Posted on Jan 21, 2009

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  • Master
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Symptoms shows that "LCD Controller board" is defective.
You can get the required board from Shop Jimmy for approx $40 and its easy to replace.

Posted on Jan 20, 2009

  • Shahid Electronics
    Shahid Electronics Jan 21, 2009

    Sound is OK and picture is not there. LCD has some color vertically strip.
    Above symptoms shows problem of LCD Controller and image of subject board is appended below.



    Above board is available in Shop Jimmy for $40


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  • Master
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  1. Most common would be a couple of capacitors in the power supply that are not letting the proper voltage to the lamp.
  2. The lamp itself is not working properly.

Posted on Jan 20, 2009

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  • Master
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Hi and welcome to FixYa,

Your described problem indicates a problem with the video interface/mainboard. It is doubtful for the power supply to be defective since the unit powers on nor would the inverter and/or thew bascklights be faulty since they "illuminate"

If our could postback the brand and model number, then a more detailed diagnosis could be forwarded.

Goodluck and thank you for using FixYa.

Posted on Jan 20, 2009

  • Louie  Role
    Louie Role Jan 21, 2009

    Appreciate the postback.

    As earlier stated, it apparently is the mainboard shown below and available here.



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  • Master
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If there is no image with the flashlight (when the TV is acting up) then you have an issue with the main board. There is usually just one board in these TVs that controls video processing and display. It may have an intermittent problem - solder joint, maybe a bad cap. You would have to open her up to figure that out

Posted on Jan 20, 2009

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  • Starnley Johnwells
    Starnley Johnwells Jan 20, 2009

    so its probably the backlight inverter board or the backlight controller IC



  • Starnley Johnwells
    Starnley Johnwells Jan 20, 2009

    l.also, the inverter dynamic dimming is
    controlled by the main pcb, so if the main has a fault, it would "turn
    off" the inverter, a technician can short the dynamic dimming pin to ground, if the inverter fires up and
    the light is on, then its the main pcb, if not, then its the inverter.most panels dont have a replaceable inverter.in most cases, it is part of the display panel itself.

  • Starnley Johnwells
    Starnley Johnwells Jan 20, 2009

    You most likely have a backlight issue with this TV set. Could be the
    inverter circuits for the backlights. The inverter is the power supply
    source for the backlights. there could also be a screen driver problem

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