Hello,
I finally decided to register here as I wanted to improve my knowledge of electronics repair.
Someone gave me a LG Flatron W2243S-PF monitor which turns off after a few seconds and while it is on it makes a high frequency noise.
I already opened the thing and replaced some of the caps, but unfortunately still the same issue. I tried something else, and plugged out the upper CCFL connectors (one with red color wire and one with blue color wire).
With those two disabled the high pitch noise was gone, however the thing still turns off after a few seconds, exactly the same.
Later on I tried to also remove the bottom CCFL connectors (so no CCFL attached anymore) now the monitor does stay on, however you obviously don't have an image (I used a flash light, and then I see the screen still being on). With only the bottom CCFL connected the screen still goes off, but the red power led stays on.
Any directions with this specifics?
I added a picture of which cap I replaced. Later on I discovered that there was another cap, which I forgot. I still need to buy a component tester (something like M328) so I can actually measure the caps.
What I replaced:
3 X 50 V 270 uF (C818, C830, C839)
2 X 10 V 1000 uF (C819, C823)
1 X 16 V 470 uF (C820)
I finally decided to register here as I wanted to improve my knowledge of electronics repair.
Someone gave me a LG Flatron W2243S-PF monitor which turns off after a few seconds and while it is on it makes a high frequency noise.
I already opened the thing and replaced some of the caps, but unfortunately still the same issue. I tried something else, and plugged out the upper CCFL connectors (one with red color wire and one with blue color wire).
With those two disabled the high pitch noise was gone, however the thing still turns off after a few seconds, exactly the same.
Later on I tried to also remove the bottom CCFL connectors (so no CCFL attached anymore) now the monitor does stay on, however you obviously don't have an image (I used a flash light, and then I see the screen still being on). With only the bottom CCFL connected the screen still goes off, but the red power led stays on.
Any directions with this specifics?
I added a picture of which cap I replaced. Later on I discovered that there was another cap, which I forgot. I still need to buy a component tester (something like M328) so I can actually measure the caps.
What I replaced:
3 X 50 V 270 uF (C818, C830, C839)
2 X 10 V 1000 uF (C819, C823)
1 X 16 V 470 uF (C820)
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