Replacement capacitor for LG TV from 2008.
daminus1
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daminus1 Posted messages 4495 Registration date Status Member Last intervention -
daminus1 Posted messages 4495 Registration date Status Member Last intervention -
Hello,
For several weeks now, my TV has been acting up when turning on, the light turns green, there is sound but the screen stays black ... by turning it off/on 2 or 3 times, it would eventually start. Until last week when it completely stopped turning on.
I had some capacitors in stock and a soldering iron, so I decided to try replacing them.
I changed these 2 swollen capacitors on the power supply board:
with capacitors of the same voltage and value in µF. But surprise, it still didn’t work ...
While removing a small plate, I noticed that there are 2 other completely dead capacitors on another board (I’m not quite sure what it’s for). However, these are 2 capacitors of 680 µF/35V and I only have 2 (470µF/35V) left.
I decided to solder them and miraculously it works again even with 470 instead of 680 ...
Here’s the picture of the board in question:
(Let’s hope you can see something, I know they are soldered haphazardly with long leads, but it was meant to be temporary).
My 2 questions are:
- Could using capacitors with the same voltage but lower capacity eventually damage the TV in the long run, even if for now it works?
- And I’m not sure if the photo is clear enough, but while soldering the 2 capacitors, I slightly burned the surface of the board, so I’m hesitant to heat that spot again even if I get 680µF capacitors, do you think that a board like this, even with a darkened surface, would have a significant impact?
Thank you.
For several weeks now, my TV has been acting up when turning on, the light turns green, there is sound but the screen stays black ... by turning it off/on 2 or 3 times, it would eventually start. Until last week when it completely stopped turning on.
I had some capacitors in stock and a soldering iron, so I decided to try replacing them.
I changed these 2 swollen capacitors on the power supply board:
with capacitors of the same voltage and value in µF. But surprise, it still didn’t work ...
While removing a small plate, I noticed that there are 2 other completely dead capacitors on another board (I’m not quite sure what it’s for). However, these are 2 capacitors of 680 µF/35V and I only have 2 (470µF/35V) left.
I decided to solder them and miraculously it works again even with 470 instead of 680 ...
Here’s the picture of the board in question:
(Let’s hope you can see something, I know they are soldered haphazardly with long leads, but it was meant to be temporary).
My 2 questions are:
- Could using capacitors with the same voltage but lower capacity eventually damage the TV in the long run, even if for now it works?
- And I’m not sure if the photo is clear enough, but while soldering the 2 capacitors, I slightly burned the surface of the board, so I’m hesitant to heat that spot again even if I get 680µF capacitors, do you think that a board like this, even with a darkened surface, would have a significant impact?
Thank you.
4 answers
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I understood that you only have that.
Use your television at a minimum.
You can still buy capacitors online, I see some for example on E... for 9 euros for 10 with free shipping, tracked letter, in France.
I'm not sure from the second photo which side you are changing the capacitors? From the component side (temporarily) or from the circuit board trace side?
In any case, I tip my hat to you ;-), well done.
Note: preferably use desoldering braid or a desoldering pump.
