LG 32LX2R No Power

[aar5384]

Ive had a punt on another tv I have been given, one that feels just as heavy as an old crt tv. Plugged it in and nothing. a quick look for the model on ebay and a set of 14 caps someones put together to sell for 7.99 + p&p saying stuck in standby or dead fix kit made me just goto cpc and get a bunch of panasonic ones for about 5.50. Is it comon for this power board to have no power output from any of the wires with the faulty caps? None look bulged buts it does look like someone at the factory dotted each on that will probley die , maybe a warranty just run out scam?

Sorry the photo isnt great, the iphone went walkies so hd webcam that doesnt look very HD to me :/ Thanks in advance

[selldoor]

Re: LG 32LX2R No Power

Picture isnt clear enough but a good dusting would have helped.
Try again from just a little further away
Caps are frequently marked in factory testing procedures.

If there is no power led and nothing happens when you switch on the test you should do carefully is firstly the fuse then the volatage at the BIG cap.
Could be 400vDC

[aar5384]

Re: LG 32LX2R No Power

Ok i gave it a hoover, reason i didnt dust it down was as a kid quite a few year ago now, i remember my uncle saying not to , something to do with changing resistance or sumthing ,he used to repair the massive tv's.

Anyway i retook tryin to hold the cam steadier. I checked the fat cap with power applied and there was no voltage coming from it, the fuse is passing current okay though.

[aar5384]

Re: LG 32LX2R No Power

Just to add, along the cable outputs i do get a 5v from one pin marked 5VSB

[selldoor]

Re: LG 32LX2R No Power

If you dont have any other boards connected that is all you probably would get.
It will need a signal from the main board to start others.
If you have 5v no need to check mains fuse

[vinceroger69]

Re: LG 32LX2R No Power

can you post a good clear shot of the psu connectors so we can read them you may be able start the psu to check voltages etc with a resistor.

[aar5384]

Re: LG 32LX2R No Power

Attached pics of the connections, oddly the old webcam is better than the hd cam at closeups :/

[budm]

Re: LG 32LX2R No Power

Good picture here, credit to Shopjimmy. Ah, your pictures finally show up.
http://assets.shopjimmy.com/media/ca...871tpt316b.jpg

Power up the board and then list the voltage reading on those connector CN804, 803 when TV is off and when it is ON.

[vinceroger69]

Re: LG 32LX2R No Power

edit budm beat me to it.

[aar5384]

Re: LG 32LX2R No Power

When you say power up the board, all i can do right now is plug a power cord into it, then on the 5VSB in the middle of CN804 is the only one showing any power all at 05.0 the rest are 00.0

I cant actually turn it on, the power button on the tv inst getting a response no lights or anything so thats just with power cord pluged in

[budm]

Re: LG 32LX2R No Power

OK, so the 5VSTBY is OK and supplying the POWER to run the main board but when the power switch is activated the main board does not send the ON/OFF (PS_ON) signal to turn on the main power supplies. So at this point you have to start checking the main board, look to see if it has any fuses, voltage regulators need to be checked, etc.
Which main board do you have in your version of the TV?
http://www.shopjimmy.com/catalogsear...t/?q=LG+32LX2R

[vinceroger69]

Re: LG 32LX2R No Power

can you also post a picture of the main board.

[aar5384]

Re: LG 32LX2R No Power

Sorry my cam is so rubbish, you wouldnt believe tht its on the 5mp setting :/

Its the same as this one

[selldoor]

Re: LG 32LX2R No Power

What make series are those two brown caps - they have been replaced on SJs

[aar5384]

Re: LG 32LX2R No Power

They are SamYoung (M) 105c

[selldoor]

Re: LG 32LX2R No Power

OK they have had some poor ones but may be ok on this board - If you get it going I would change them. Next thing might be to check the voltage regulators, there are quite a few on there. To start with perhaps start on the 3 near to where the 5v pin is.
State the part number and state the voltage on each pin with respect to a ground screw
or the plate where it goes.

[aar5384]

Re: LG 32LX2R No Power

All came back with 00.0 Except on the AC side Q104 read 250v on centre pin

[selldoor]

Re: LG 32LX2R No Power

Sorry I had moved onto the Main Board IC1005 IC1006 and possible IC1013 but not certain that last one is a VR.

[aar5384]

Re: LG 32LX2R No Power

OK i checked them all and theres nothing coming thru any of them, but would there be any voltage on them anyway seen as the only voltage going to the mainboard is that from the 5volt line?

[budm]

Re: LG 32LX2R No Power

"All came back with 00.0 Except on the AC side Q104 read 250v on centre pin" Which board is this? Main board?