LG 32LB9D No sound

[dcapper]

Anyone have a way to factory reset this tv? I have had sound at times. Or any links to firmware? I did the menu on the remote and menu on the tv and there is no reset option in there.

EDIT: WOW! I just pulled the mainboard out to take a look. It's completely warped. It must has gotten really hot before. I'm assuming this will need a new mainboard.

[tom66]

Re: LG 32LB9D No sound

The most common issue on these sets is low 3.4V from the PSU causing a variety of issues, such as nonfunctional sound, poor digital TV reception, TV not responding to the side buttons, etc.

[dcapper]

Re: LG 32LB9D No sound

Hi Tom,

When I got it, it had one blown cap in it. I only replaced the one. Maybe I better look at replacing them all. The sound works once in a while.

Thanks for the info

[dcapper]

Re: LG 32LB9D No sound

Oh I forgot to mention. There is 32000 hours on the tv.

[tom66]

Re: LG 32LB9D No sound

Check the 3.4V pin on the power supply.

[dcapper]

Re: LG 32LB9D No sound

I replaced all the caps and still no sound. So I tapped the power supply in different spots until the sound came on. Cold solder joint on one of the FET's. Tv is working again.

[alfatv]

Re: LG 32LB9D No sound

I had this TV for a while.
First, looks like too much current was going through 3.4V wire, the wire and connector pins got burnt.
Replaced the wire, soldered directly PCB to PCB.
The TV was working, but with lots of background static digital noise.
Replaced 2200uF and 3300uF caps in power supply, not so much noise as before, but still there is still some.

[nomoresonys]

Re: LG 32LB9D No sound

Might have some more bad capacitors on the board.