LG 42LE4500 No display

[tom66]

Re: LG 42LE4500 No display

Erm... Thanks Tom. Alas I'm a little puzzled what that has to do with my question. It wasn't caused by water damage.

Do you have a backlight or not? You haven't mentioned if you do.

[newtothis]

Re: LG 42LE4500 No display

Do you have a backlight or not? You haven't mentioned if you do.

If experience has anything to do with it Tom you can assume it doesn't. LED driver always goes bad on these PSU's for some reason.

Obviously wait for their reply but I know what my bets are on

[Honacloi]

Re: LG 42LE4500 No display

Do you have a backlight or not? You haven't mentioned if you do.

There is no backlight Tom, that's why I said black - I'd have mentioned if it was glowing as I know the difference.

[newtothis]

Re: LG 42LE4500 No display

I have now done a fair few of these and only once has a PSU replacement not remedied the problem.

[EkoPT]

Re: LG 42LE4500 No display

I have now done a fair few of these and only once has a PSU replacement not remedied the problem.

Hi.

How did you repair that one?
I had the same exact issue, replaced the PSU but the problem remains.
TV on, 2 seconds later, black screen.

[newtothis]

Re: LG 42LE4500 No display

I never repaired it, Was a bad LED strip

[EkoPT]

Re: LG 42LE4500 No display

I never repaired it, Was a bad LED strip

How can i confirm if the new PSU is in good conditions?
Its possible the problem is somewhere else?

[newtothis]

Re: LG 42LE4500 No display

If you already replaced it you can be pretty sure its the LED's

[EkoPT]

Re: LG 42LE4500 No display

If you already replaced it you can be pretty sure its the LED's

Its fixable?

[newtothis]

Re: LG 42LE4500 No display

If you can get the LED strips

It is not an easy thing to do though, There is the chance of damaging the panel while attempting it.

[katanka]

Re: LG 42LE4500 No display

Hello,

i have the same problem with my TV LG 42LE4500.
The TV powers ON ( with switch or remote), Red light animation during several seconds and after white light.
When i use the remote, white light flashes.

Black screen and no sound during all of this

[thoma]

Re: LG 42LE4500 No display

http://www.electronica-pt.com/esquem...artdown/25596/

schematic available

regards thoma!

[bluewater_ukk]

Re: LG 42LE4500 lines on screen

I have Lg 42Le4500 for about 4yrs and in recent weeks it started to show some lines on the left side of the screen, in start they were appearing intermittently on one side of the screen but now they are of a constant feature on the left of the screen. Saw few youtube post but of no help.

Can someone advise what is the issue and it it could be fixed. can post photos if that would help.

Many thanks
Jiimy

[aygun]

Re: LG 42LE4500 No display

I have replaced the LED driver with some TL4115 Constant Current Source at 12Volts.
Modified the led strips. 4 LED's series with other series in parallel. The results ?

[aygun]

Re: LG 42LE4500 No display

This is modification. The TV was saved and at 12Volts i have at 104 LED's onli 388mA consumption. The drivers arecold as iceand no problem's at all.
The TV is working very well. Also the LEDS are protected . Are staying cool because of current limitaition on jonction

[aygun]

Re: LG 42LE4500 No display

Because of thumbnails i post the link to the albums :

http://postimg.org/gallery/1k8amswmo/804f0fca/

http://postimg.org/gallery/1vvxege5c/ae3b832f/

[aygun]

Re: LG 42LE4500 No display

The test's made last days

[aygun]

Re: LG 42LE4500 No display

[aygun]

Re: LG 42LE4500 No display

[Ivan Goh]

Re: LG 42LE4500 No display

Hi,
I'm new & this is my first post..
After reading a while in a few related threads, I hope to learn some real good knowledge from you guys.

I've got a LG 42LE4500-TA, been using for more than 5years.
Weeks ago it just suddenly "die off", become no display.
(i think i heard a small "pop" sound when it went Black screen)

When i try to Turn it ON, the LG Logo appears,
as usual, follow by the red-LED running fine,
but, when it next turn into the White LED indicator, the screen just black-out.

I'm trying to seek some advice if it is worthwhile to try repairing it.

I'm trying to attach a video(in zip-file). Hope it can be viewed easily.

thanks alot for any kind advice!