help needed off tv repair man

White Van Man

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I have a Goodmans GTV32W3LCD tv that is faulty and would like to repair it.The fault is no video when turned on video is their for about 2 secounds then goes off but sound is ok.Or can anybody let me know of a good tv database for faults that are free
 
sounds like it could be a problem with the invertor board that powers the lights behind the LCD screen

could be a dry capacitor causing overload protection to shut it down
 
sounds like it could be a problem with the invertor board that powers the lights behind the LCD screen

could be a dry capacitor causing overload protection to shut it down

Thanks for replying.
I opened it up and powerd it up and everthing is ok.I tapped around psu and all other cct boards for dry joints but still could not get the video to go off.At the moment its working fine.I am just keeping my fingers crossed it won't happen again.So i am still looking for the cause of the problem if it comes back.
 
It does sound like a capacitor fault.

Go over the board looking for bulging capacitors or leakage.
 
Sounds like a dry joint on one of the transformers, or other components on the inverter pcb.
 
id go with the above.....dry joints on the transformers on the inverter pcb would be a very good place to start......
 
thanks everyone for your input.I take it the invertor board would be the one that feeds the backlights on the back of the lcd screen? i am not sure as i will need to take this out when fault appears again and will check all caps and look for dry joints
 
Thats the one, two wires for each back-light going into the screen, normally a white and a pink one.
 
Thats the one, two wires for each back-light going into the screen, normally a white and a pink one.

Thanks
When fault reappears i will open it up and take inverter board out and check.Then i will let you know how i get on.
 
since this was posted tv was working fine,just used now and then in spare bed room.Well i tried it other day and the same problem blank screen but audio.I have changed inverter board.(ordered second hand tested one off ebay) the problem is still their.I have looked for bulging caps on psu but can't see any.tapped all round for dry joints still no luck.does anyone know where i can get a schematic for this tv then i can repair to component level as its going to be expensive to keep buying panels.
 
Can you check if you have 24 volts going from the power supply to the inverter ?
 
when i find my test meter lol will check for this .if yes what should i be looking for and if no i take it problem on psu panel what should i be looking for as i have no cct diagram it will be lot harder
 
Power supplys faulty then, any bulging caps ?, I take it the power supply is a 17pw someting ?
 
yes its a 17pw11-2 can't see any bulging caps. do you know where i can get a schematic from this? as job would be a lot easier to solve.
 
Thanks i will look at this in more detail this cap c878 is this on main psu board ? and not on 17pw11-2 board.I also like the link of the site you sent as panel is really cheap.I will order this but will see if i can fix this as well as same might happen to new board.Thanks for the schematic and you time for looking for this.
 
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