le37r87bd help

[tonyuk]

hi peeps just got this samsung as above now the tv will turn on but i cant get a picture checked power on psu and all seems ok but if i play with plug that goes to buffer i get picture for a few secounds then goes blank again ? any idears plz

[tom66]

Re: le37r87bd help

Buffer on an LCD? You mean inverter board?

[tonyuk]

Re: le37r87bd help

im trying to get pic but in this tv theres only power board in center from that theres a cable runs to right side cable slot marked cnm8 03 now if i unplug that then slowly push in i get full picture then goes ? checked all marked pins and i get 24v readings as says on board

[tom66]

Re: le37r87bd help

Pictures would help.
Do you have a backlight?
Do you have any image?
2 seconds to black fault is what it sounds like.

[tonyuk]

Re: le37r87bd help

yer i get picture and sound but only if i unplug then hold plug in if i leave in then i get no picture or backlight

[tom66]

Re: le37r87bd help

Unplug WHAT??
Please, PICTURES!

[tonyuk]

Re: le37r87bd help

pics

[tonyuk]

Re: le37r87bd help

the cable on left in first pic white with black

[tom66]

Re: le37r87bd help

Thank you.
Now, please turn the TV off and turn it on in a dark room, do you see a flicker from the backlight as the TV first turns on?

[tonyuk]

Re: le37r87bd help

Thank you.
Now, please turn the TV off and turn it on in a dark room, do you see a flicker from the backlight as the TV first turns on?

thanks tom yer get a little flash on screen then goes black

[tom66]

Re: le37r87bd help

OK, now remove the shield from the inverter board. That's the board the white and black cable goes into. Take good clear photos of it; if necessary, split the board into different photos.

[tonyuk]

Re: le37r87bd help

ok will do thats now

[tonyuk]

Re: le37r87bd help

pics

[selldoor]

Re: le37r87bd help

Set your meter on ohms 2000 and test each transformer between 1 and 8 and 4 and 5
and post results ( NO POWER TO BOARD)

[tom66]

Re: le37r87bd help

Set meter on 20000 ohms (20k ohms)
Test across points highlighted. Record reading and post here.
Repeat for all transformers on the board. Pins 5 to 8.

POWER TO INVERTER MUST BE OFF - UNPLUG TV!

[tonyuk]

Re: le37r87bd help

on first pic the bottom i think ic ? looks like its been changed befor and a poor job aswell

[tom66]

Re: le37r87bd help

Wouldn't surprise me - the transformers in these frequently fail.

[selldoor]

Re: le37r87bd help

Yes - meter on 20000ohms must be inflation!! the 2016 is just over 2000 so if this is the same would be off scale!

[tonyuk]

Re: le37r87bd help

ok so on that side of board most r 6.06 some r 6.01 but the one i said about dont get a reading

[tom66]

Re: le37r87bd help

The one which has been replaced you do not get any difference from probes not touching?
I would check it is soldered right - if so it might be a dodgy part or bad luck.