Question about Goodmans W280NS Television

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Goodmans LD3755HD Picture Problems

We've had the above TV for a year and no problems but last night the picture started getting 'grainy' and then broken coloured lines appeared over the programme and then eventual the picture disappeared completely and various coloured lines and blocks appeared.
I have disconnected the power, etc and when re-turning the TV on it is ok for a few minutes then the problems start again.

Please can you help? This

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  • tomchik Jul 25, 2008

    There is no problem with the signal source. I need advice to locate the component area e.g. video processing chip, condensors etc.

  • tomchik Jul 29, 2008

    I have changed the main board and the power supply and the same fault exists. The picture is poor from all sources and after 30 mins it breaks up into two distorted pictures with cloured lines and bars.

  • tomchik Jul 30, 2008

    Filter circuits are OK. Output from main board is fine.

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  • Master
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Let me give you Technical tip. Find "IF Block" in TV, it would be near Tuner, Open the IF Block and resold it with solder iron. make sure not to make bridges between solder points. Reason of problem in your TV is .."acostic tuning frequency drift". I dont know, how to clear my point. But I am sure, this will solve your TV's problem. Good luck.

Posted on Jul 30, 2008

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  • Master
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U have problem in filter ckt u have chnage the capcitor

Posted on Jul 29, 2008

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  • Master
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Hi,

Pls try using the TV with pure video signal only such as a DVD or even an old VCR. If the problem persist with the DVD, then yes it could be the video processor, if not than chances are it is the built-in tuner of the TV (most likely). Since the tuner block is a single assy, then it would be relatively easy to identify and replace. Often, it would look something like below.
Goodmans LD3755HD Picture Problems - ca7914a.jpg
If on the other hand, it is the video processor, then your best would be to get hold of a service manual or at the very least a schematic diagram with voltage readings if you are considering a do-it-yourself repair.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.


Posted on Jul 25, 2008

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The problem is with you tv signal...
when the signal is ok the picture will be clear

Posted on Jul 23, 2008

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SOURCE: Goodmans LD3755HD Picture Problems

for cms voodoo, change your power module.
for tomchik, check your input voltage for voltage drop or fluctuation, if any employ voltage stabilizer, then change your power module. make sure that there is enough ventilation around your tv.
for bananahead , go and change your backlight inverter

Posted on Oct 11, 2008

6ya6ya
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Posted on Jan 02, 2017

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for cms voodoo, change your power module.
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