lg42le4500 screen issue

[nigeyb]

hi all i have an lg42le4500 tv will turn on and have picture and sound but sometimes picture goes black but still have sound.if i disconnect the tv from power source the longer i leave it the longer it stays on next time i turn it on, any help would be appreciated

[augiedoggy]

Re: lg42le4500 screen issue

hi all i have an lg42le4500 tv will turn on and have picture and sound but sometimes picture goes black but still have sound.if i disconnect the tv from power source the longer i leave it the longer it stays on next time i turn it on, any help would be appreciated

Possibly a poor connection on an led? 99% or these lg sets I see have bad leds.

[freakaftr8]

Re: lg42le4500 screen issue

This model uses edge lit technology. Doubt it's an LED issue. More or less a mainboard issue. Very common BGA separation under main processor.

Do you still have backlights when picture goes out?

[budm]

Re: lg42le4500 screen issue

If there is no backlights then if the TV is staying on long enough for you to go into OSD USER Menu setup and turn down the backlights level to as low as you can and then see if the backlights will stay on longer or not.

[nigeyb]

Re: lg42le4500 screen issue

thanks for the reply,do you think it could the processor over heating? as the tv can stay on for a few hours then clicks off

[Pragmatiko]

Re: lg42le4500 screen issue

Hello your problem is caused from bad solder under SoC. Reflow it and will fix it. ��

[flosspike]

Re: lg42le4500 screen issue

I've fixed a few TV's in my time and knowing how old / history is also important, it kind of eliminates certain issues. For example, I have a 42" LG tv, classic black screen/no sound but! it was working fine just before the lightening storm and is about 4 years old, little internal dust. I'm reluctant to spend £50 on a working board but realistically, unless we personally gain from a repair, it's all about minimizing costs which is a shame as you gain so much knowledge working out why a circuit has failed, swapping out boards is easy but less educational.