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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?

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  • Bananahead Feb 21, 2008

    I have the same problem. It is actually model GTVL19W19HD and is just over 12 months old. TV switches on ok, but the picture disappears after about 1 second. The sound remains ok though. Seems no one wants to repair it. Goodmans cannot supply a repair manual - out of stock apparently.

  • tomchik Jul 23, 2008

    I have another brand which is the Techwood 37722 and it uses the same Vestel main board17MB15E-7 as the Goodmans LD3755HD, Hitachi 37LD8700UH and Toshiba WLT68. The fault is similar after 10 or 15 minutes the picture becomes two distorted images and sometimes four with coloured bars. Initially some weeks ago there were faint diagonal green lines but I changed the PSU and they disappeared. The duration which a normal picture appears seems to be getting shorter.



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  • 191 Answers

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


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SOURCE: Goodmans LD3755HD Picture Problems

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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Goodmans LD3755HD Picture Problems


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.
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.

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