LG LED blinking

E

Electronman

New Member

• Oct 3, 2009

• #1

Hello,

I have a LG TV, The model is: "Cf-21d52ex".

Unfortunately the TV standby LED just blinks when I turn the TV on and I have no AV, Just have LED blinking.
Can you guys help me out to realize whats the problem on the TV?

Thanks.

 

Sceadwian

Banned

• Oct 4, 2009

• #2

Contact LG support.

 

sheldonstv

New Member

• Oct 4, 2009

• #3

could it be an lcd????have a look at the smps and you will find(depending on model)split domed capacitors-several may need replacement ,if its the set im thinking of replace them with hi temp types rated at 25v dc(the two supplys affected are the 5v supply and 12v supply

 

Sceadwian

Banned

• Oct 4, 2009

• #4

That's a big inference to make from a blinking LED on a TV

 

E

Electronman

New Member

• Oct 6, 2009

• #5

Thanks I solved the problem.
It was due to a capacitor in the power supply part.

Thanks again

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Oct 6, 2009

• #6

Sceadwian said:

That's a big inference to make from a blinking LED on a TV

Click to expand...

Not really, by FAR the biggest problem these days (and for years now) is high ESR electrolytics in the PSU.

 

Sceadwian

Banned

• Oct 6, 2009

• #7

Sad... So sad... Given the failure rate I'm really surprised more though isn't put into PSU designs.. Even with the added cost, I personally would eagerly put up the extra cash for the higher reliability.

 

Last edited: Oct 6, 2009

E

Electronman

New Member

• Oct 8, 2009

• #8

Yes I found that the problem is a 100uF 16V capacitor on power supply unit.
I found the problem by a hairdryer lol.

What ESR does mean?

 

EN0

Member

• Oct 8, 2009

• #9

Electronman said:

Yes I found that the problem is a 100uF 16V capacitor on power supply unit.
I found the problem by a hairdryer lol.

What ESR does mean?

Click to expand...

It is a acronym for Equivalent Series Resistance