lg 47lx6500 backlight with sound no display

[smuddge]

I have an LG 47LX6500 that turns on shows the lg logo can press front display buttons and I get full audio. just no display at all.
I am thinking tcon but i wondered if someone else may have some experience and may know what exactly problem is.

attached are pics of the boards.

i have looked around to try and find the tcon for sale but i can't find one. everywhere out of stock.

[Diah]

Re: lg 47lx6500 backlight with sound no display

for how long you have the LG Logo show on the screen..? after logo gone and sound can be heard are you sure the back light still lighting up?

[smuddge]

Re: lg 47lx6500 backlight with sound no display

logo is below the screen on the bezel. nothing comes on the screen. just turns a light color and stays that way. from the back i can see backlight is on.

backlight never goes out until i turn off tv.
just no picture at all.

[smuddge]

Re: lg 47lx6500 backlight with sound no display

anyone?

[maxvalutech]

Re: lg 47lx6500 backlight with sound no display

Have you tried different inputs like DVD via AV and HDMI etc.What is make and number of tcon and do the fuses diodes on it check as good. Is connection to main board good.

[smuddge]

Re: lg 47lx6500 backlight with sound no display

sorry for the late reply. Been busy re roofing my house.

anyways I would really like to get this tv going.
it was a great picture when it was working.

after looking at it further and trying it myself there is no audio either. I took my wifes info as fact. (clearly test myself or don't say it is so...)
here is a picture of what the screen looks like with tv on.
I can hit the input button but the screen stays the same no matter what I do.

I am thinking mainboard now myself but I don't know for sure.

I see tons of repair services for this mainboard on ebay but apparently its for no signal on hdmi ports. I have no display or sound.
I see no one is selling this board either just repair services.....

hopefully someone has some ideas.
shame to let this rot.

[budm]

Re: lg 47lx6500 backlight with sound no display

Try having one ribbon cable between the LCD panel and the T-CON connected one at a time to see what you see on the screen, just make sure to insert the cables back in place correctly.

[smuddge]

Re: lg 47lx6500 backlight with sound no display

from my research this seems to be a mainboard issue and from all the repair options on ebay I think it is a reball for the main board that is required.
there are none available from anywhere reliable and the cost of even the repair ,which i suspect is a heat gun or oven (which isn't to my liking at all), is 250$ min.

What a huge waste of a nice tv.

[saimir]

Re: lg 47lx6500 backlight with sound no display

I have a lg 47lx6500 tv also have this problem
no display
what you can do that

[Wilderone]

Re: lg 47lx6500 backlight with sound no display

Reflow Mainboard

[saimir]

Re: lg 47lx6500 backlight with sound no display

hello Wildone
this is tv lg 47lx6500 light led stay in AV
any repair
bay

[storexxm]

Re: lg 47lx6500 backlight with sound no display

My tv turns on, backlight for a sec... then off... high pitch sound like a whistle... backlight on and off again.. sound works... I tried to use my phone flashlight but couldn't see anything. Please any suggestions??

[budm]

Re: lg 47lx6500 backlight with sound no display

My tv turns on, backlight for a sec... then off... high pitch sound like a whistle... backlight on and off again.. sound works... I tried to use my phone flashlight but couldn't see anything. Please any suggestions??

Same TV model?
Can we see good clear pictures of the backside of the TV showing all the boards?

[storexxm]

Re: lg 47lx6500 backlight with sound no display

Hello budm.
its exactly the same model.
i will upload clear pictures, but coud't fine anything suspicious.
maybe some knows: can the mainboard be faulty when sound is ok... but no image..?

[budm]

Re: lg 47lx6500 backlight with sound no display

Hello budm.
its exactly the same model.
i will upload clear pictures, but coud't fine anything suspicious.
maybe some knows: can the mainboard be faulty when sound is ok... but no image..?

Need to find out where the high pitch sound is from, you also need to do some Voltage testing.

[budm]

Re: lg 47lx6500 backlight with sound no display

It's 1AM my time here so I will have to do follow up tomorrow, may be some one will look over also and help you out. Good night.

[storexxm]

Re: lg 47lx6500 backlight with sound no display

thank you bud & good night...
the problem with the high pitch.. i cant locate it... not even which board..
but the sound is NOT same with the backlight... its inbetween those two on and off attempts-
more like when the status led on the front panel illuminates the soft touch buttons.

[storexxm]

Re: lg 47lx6500 backlight with sound no display

when back home i will do a video and some pictures of the boards-

[storexxm]

Re: lg 47lx6500 backlight with sound no display

pictures attatched...
seems like somebody was already behind the power board...
can i just disconnect the two upper connectors to see if the backlight forces the tweet sound...?

[storexxm]

Re: lg 47lx6500 backlight with sound no display

i also made a video from the area i think the sound comes from (near the LED Status LED and Speaker i guess...)

https://youtu.be/J9ZrqGQ6LCI

u can also hear the sound