Lg power on issues

[siddiq]

Hi everyone, i have this old but functional LG lcd tv [26LG30R].The problem now is that when it is unplugged from AC and plugged back,the HW/AC reset switch has to be pressed before the tv will power on.
When it is off in standby mode it powers on normally till AC is disconnected,then the reset has to be engaged for the tv to power on.Any point in the right direction will be greatly appreciated.Thanks in advance.

[gilly1984]

Re: Lg power on issues

Is the main board water damaged?

[siddiq]

Re: Lg power on issues

No there is no water damage just a little rust on those metals. The tv works fine when powered on.

[gilly1984]

Re: Lg power on issues

If the metal bits have rust on it the board could have corrosion somewhere causing the fault.

[siddiq]

Re: Lg power on issues

i have checked the board entirely.The problem started about two weeks ago.There were some unusual power outages in our area so i don't know if that was the cause of the problem but i will clean off all rust and see if that helps.Thanks for reply.

[siddiq]

Re: Lg power on issues

Hi,i have cleaned the board with electronics cleaning solvent but the problem still remains.I have to press the reset switch anytime i disconnect power from the mains and reconnect before standby light will come on.

[MisterD]

Re: Lg power on issues

How long are you waiting after you plug it back in? I would try waiting at least 5 minutes and see if the Standby Light comes on without pressing reset. I'm not sure if it will work but it's worth a try.

[gilly1984]

Re: Lg power on issues

Just had a quick read through the manual and see no reset button? Can you show us a pick of the button you have to press to get it working again after unplugging.

[siddiq]

Re: Lg power on issues

Well what do you know, i left it on for almost an hour and the standby light came on.It wasn't like that before.The last time i left it for almost two hours and nothing.Maybe it was the cleaning solvent.Thanks for your help.

[siddiq]

Re: Lg power on issues

Just had a quick read through the manual and see no reset button? Can you show us a pick of the button you have to press to get it working again after unplugging.

If you zoom in on the pic i posted [media board] you should see i have labeled it reset switch [SW800].

[gilly1984]

Re: Lg power on issues

If you zoom in on the pic i posted [media board] you should see i have labeled it reset switch [SW800].

If it does it again check the 50v caps on the power board.

Normally low uf ones. Someone else may be able to help you more as i am just learning from here at the moment.

Do you have to wait 2 hours for the standby light?

Leave it off for a few hours so you know it wont come straight on, then, before plugging it in warm the psu up with a hair dryer for 20 seconds so its nice and warm, then plug it in. If the standby light comes straight on you know its a cap somewhere. Mine was a 50v cap that was the problem..

[gilly1984]

Re: Lg power on issues

Ah yes, i see the reset button now.

[siddiq]

Re: Lg power on issues

If it does it again check the 50v caps on the power board.

Normally low uf ones. Someone else may be able to help you more as i am just learning from here at the moment.

Do you have to wait 2 hours for the standby light?

Leave it off for a few hours so you know it wont come straight on, then, before plugging it in warm the psu up with a hair dryer for 20 seconds so its nice and warm, then plug it in. If the standby light comes straight on you know its a cap somewhere. Mine was a 50v cap that was the problem..

Oh ok.I will try it and post results.Thanks a lot.