Re: LG W2243T-PF buzzes and shuts down a few times, then goes black

Hi,

I did change the transformer and it behaved the same.
I gave up repairing it myself and went to a repair service. The top lamp was almost dead and I presume it made the transformer noisy.

They said a replacement from china would take 1-2 moths and offered to install a led back panel or something like that, for faster and for less money. It works great ever since.

Re: LG W2243T-PF buzzes and shuts down a few times, then goes black

Sorry about that, here's the requested picture....

Re: LG W2243T-PF buzzes and shuts down a few times, then goes black

mscserbia: I've added a picture of the other board.

selldoor: Testing one lamp at a time buzzed just on one circuit (not the lamp), the top lamp circuit, and it wen on just fine.

lexwalker: Yes, the capacitors are Jamicon.

In the meantime I did not keep my promise to get a multimeter since most of them have the max measure capacity of 200uF and all the big ones from the board are way over.

But I've replaced the 6 ones since they are dirt cheap. Nothing...

Re: LG W2243T-PF buzzes and shuts down a few times, then goes black

On the picture some connections are quite different than in reality.
I've resolder some as you can see in the new picture.

In the meantime I decided to check the lamps, I've disassembled everything and connected the lamps. I even moved the wires a bit to see if it affects something. They seem fine.

After that I've connected just the top or the bottom lamp alone.
When just the top one is connected it makes the buzz 2 times and shuts down.
When just the bottom lamp...

Hi,

This LG W2243T-P has about 4 years now. The 1st signs of failing were a minor buzz and a top screen flicker in intensity. The following day these two got stronger and after 2-3 oscillation of buzzing and flickering it went off completely and still does that every time I turn it off and back on again.

Before I found some similar issues on this forum I've removed the SPW-102 transformer that's sitting next to the board in the picture. I've done this because it seems it's the buzz source and while nudging it while buzzing modified the sound that it made.

...

Re: New Members - please post your introductions here

Hi,

I'm Sebastian, 26 years old, from Romania.
I work full time as a software engineer. My hobbies used to include tinkering with electronics a long time ago. Now I just repair stuff in home, thus my arrival here

So far I've found useful information here but need more!
Looking forward to help if I can and I want to thank you all in advance.

Happy tinkering!