Facing TV Problems? Ask a TV Technician.
Hello, Sorry you're having problems.
In order to help you, I need to ask for more info:
1) Roughly how old is the set please?
2) Is there any external sound system connected to the TV?
3) What is connected to the set that you view from (cable/SAT box, DVD player, etc.)?
Thank you. So right now there is NO sound through the TV speakers, or is it intermittent/breaking up?
Okay, the fact that the TV made a crackling sound indicates a component failing/failed in the TV. There is never an instance in a TV when a noise is heard where it does not indicate electrical components shorting out. The issue is the Mainboard in your TV has failed and needs to be replaced. This board processes all of the external AV signals (the sound options in the MENU, picture settings, etc.) and contains the processor for the entire TV. There are not any quick fixes for this aside from leaving the TV unplugged for a length of time (several hours or more), in the hopes the processor resets. Beyond that the set would need its Mainboard replace which is on average a $225 repair on this set. I would consider though, that a brand new 37" LED TV can be purchased for almost the same cost so it is not cost effective to put that money into a 10 year old LG where parts are braking down. These sets are not built to last much longer than this anyhow.
You're welcome. If you're looking to attempt a DIY repair of the set, the Mainboard is typically available for around $100 through used/pulled parts sites. I am able to find one in stock for $145 at the link below for your model:
Other than that, I'm sorry for the bad news here and wish there were a quick fix.
If you need further assistance let me know. Before you go, PLEASE DO click at least a 3 STAR RATING, at the top your screen. That is how I am credited for my efforts by the site.
If it will even allow you to- and it wouldn't hurt to try, but the fact that you heard a crack sound is not within normal operation of the TV and directly indicates a short.
Give it a shot. If it does not work then the rest of the information needed to decide to repair or replace the set is above.
You're welcome and best of luck. If you need further assistance let me know. Before you go, PLEASE DO click at least a 3 STAR RATING, at the top your screen. That is how I am credited for my efforts by the site.
Do you need further assistance with this?