Lg 47lm860v 3d tv- no picture

[Longon]

Hey there L....
Not quite sure what you mean matey?
See attached confirming where the issue is..

[lotas]

Each connector has contacts on the other side (which are soldered to the board) and there is a numbering of each output, insert the cable and use a multimeter (on the continuity tester) to check each line, that is, one probe on the T-CON connector, the second probe on the connector (on the soldering side) of the buffer bar, and you continuity test each line with a multimeter, moving the probes to each contact (1pin.- 1pin., 2pin.- 2pin., 3pin.- 3pin.,..........) and do the same between the motherboard and T-CON.

[Davi.p]

For shure it has not to be like so, therefore simply try to pry those pins back to the original position using a needle , it's very kindly not touching well the cable side..

[Longon]

Put pins back, checked lvds and ribbons for continuity all ok-replaced and still no change. led's still working ok, tried other inputs hdmi nothing changed!
I began checking generally again in and around IC 302 and various caps associated seems that there maybe a problem with.....does this IC and buck converter have any affect or is this totally seperate. I compared to other power supplies and IC 300/3 are simular resistance and V but totally different to 302!!!

Also I'm only getting 0.3 v caps 604/6/8 and 5/7 1.8 v...are these correct?

[Longon]

IC 302
pin 1-0v
2-11.5
3-0
4-0.8
5-0.75
6-3.3
7-1.04
8-1.04
and caps 139/154/332/329/131 just around 1 v.........Do these sound OK as am unsure but doesn't seem right...

[lotas]

If T-CON sees any faults (low resistance or short circuit) on the output voltages for the panel, it blocks them, disconnect one cable from T-CON and the panel (from the T-CON side) and turn on the TV and see what's wrong with the image, then reconnect the cable and disconnect the second one and also check the image (the image will appear on at least half of the screen).

[Longon]

If T-CON sees any faults (low resistance or short circuit) on the output voltages for the panel, it blocks them, disconnect one cable from T-CON and the panel (from the T-CON side) and turn on the TV and see what's wrong with the image, then reconnect the cable and disconnect the second one and also check the image (the image will appear on at least half of the screen).

Hi L....Pic 1 is after removing left ribbon from T-con and pic 2, the right! This supposed to happen?
Long

[Longon]

Ok now i understood the first post, i would bet more on a damage of main board than the tcon board, if you do the panel test then you can find better the fault, now i wonder why you changed cables and which one you mean, the tcon output side or input? The worst scenario is the output one as you probably fried a Cof, in the best of cases you burned one small cap on screen strip boards

Hi D......Sorry for delay in responding.
If I need to check the Cof or caps I've never delved that far into checking these components. They are taped down quite well and is there anything I should be aware of whilst removing and inspecting except for being extra careful as don't want to cause any further damage anywhere!
Where should I also test on the main board as you mentioned doing a panel test..to be honest I can't quite remember with any certainty which of the cables I changed at the time whilst the TV was still powered but I suspect it was the ribbon on the T-con side!
Long

[Davi.p]

Sorry, it's quite difficult to follow these threads on this forum at so long delays, and also to bear with unexperienced users.. give me time.. today is TENNIS day...!

[Longon]

#Davi & all....I understand, can imagine following up various threads/forums as well as our day to day lives...must be a little brain draining especially with relatively newbies like myself hounding your knowledge.
Apologies for in and out with questions and queries to all who have taken time to assist, I expect time differences are a factor also, but still, much appreciated.
Regards
Long
(P.S have a great game)

[Davi.p]

Let's make things easier, what you do not understand?

[Longon]

Hey D......
Referring to earlier posts #24-27 are the low V and Resistance a factor?...
Apologies for my ignorance but you mentioned a panel test, could you clarify what you meant?
When investigating the possibility of damage to the Cof and apart from testing Caps is there anything else that I should be aware of? do's and don'ts!!
Long

[Davi.p]

The panel test in the more simple words: run a wire from power board 12v out directly to the tcon 12v input, there are 4-5 pins tied toghether at side that is that input, refer to lotas image, remove connection on tcon by main board, feed AC in, it the panel shows a cycling of colors then.screen is 100% sane.. the rest later..

[Diah]

GPU could not tested panel in stand alone... yours issue at MB. if the panel buffer boards didn't suffer from liquid damage at buffer boardsb

[Longon]

The panel test in the more simple words: run a wire from power board 12v out directly to the tcon 12v input, there are 4-5 pins tied toghether at side that is that input, refer to lotas image, remove connection on tcon by main board, feed AC in, it the panel shows a cycling of colors then.screen is 100% sane.. the rest later..

Need to check if correct!!! You say feed AC in...not DC?

[Davi.p]

sorry it came IT instead of IF..the panel shows cycling...
Feed AC in the power board input...

[Longon]

Rather than make a mistake and feeding in AC I put in a DC 12v and nothing happened!!
Can you advise where I should jump 12v from and to on attached photo...so confident I'm doing correctly..

[Davi.p]

the board has an output connector to the main board, it surely has a contact for 12v, you can solder a wire under