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.

A couple of days ago during the weekend, I booted up my trusted pc lo and behold I heard the Windows startup sound but my LG monitor (LG1753S) screen is.

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 µF (C818, C830, C839) 2 X 10 V 1000 µF (C819, C823) 1 X 16 V 470 µF (C820). I think it must be something with the transformer, because I discovered that the initial issue it has is not that the display turns off, no only the backlight is turning off. Is it likely that the big cap has degraded and not able to supply the voltage anymore? And I also forgot to replace the tiny cap you see just above the big heatsink. I ordered a component tester so I can actually test caps instead of randomly replacing things. I'm a bit precautious because of the high voltages of the CCFL I read everywhere.

Hello MsG, did you solve your problems with this monitor? Yayati book pdf free download pdf. I have similar issues with the same model, but in my case the backlight is turned off after 0,5s.

I did the same as you, I replaced the caps, it didn't help. CCFLs are OK as I have tested the unit with different CCFLs and the same problem arises. Thus the transformer is a good guess but not worth purchasing anew, I suppose. Did you notice that the service manual you attached is for this model but refers to different electronic boards?What a mess!!! I could't find appropriate schematics for this unit. I would give it a try but I now see that 1/6 of the screen (right, vertically) is not properly addressed, no image and vertical lines. I guess either the TCON card or 1 of the connections to the LCD panel is defective.

There is therefore not much to do with this unit. I will take the PSU put of it for the capacitors but that's all. My purpose was to identify the origin of the problem and I succeeded. But in this case the repair failed. No worry I still have a couple of candidates for repair in my basement!

That is a great monitor but do you need it? I think yes Do you know what separates the Eizo from the NEC PA241w or a Dell U2410 or the > Samsung & LG mentioned in the other response here? Just kidding, I post process my pics myself and found frustrating not seen all the colors that my camera delivers and went to a pro retoucher studio and see him working in a CG221 which I can't afford and realised that in that monitor could see all the colours I was missing in my monitor and I am telling you this because I am an fine artist and know the difference between a Cadmiun red, a alizarin crimson or a rose madder. I have a calibrated eizo flexscan that only supports sRGB, that's why I want to upgrade to a better monitor. Could you please tell me what exactly do you mean? Would a monitor half the price and with all the same features suffice and then leave > you some cash to buy a new lens or update some editing software? To buy a new lens?

Like the new nikon 70-200 VRII? Vidal wrote: That is a great monitor but do you need it? Plagin nozhi dlya ks 16 dlya deathrun serp 1. I think yes Do you know what separates the Eizo from the NEC PA241w or a Dell U2410 or the > Samsung & LG mentioned in the other response here?

Could you please tell me what exactly do you mean? The Eizo CG243W uses a variant of a LG supplied H-IPS TFT LCD panel very similar to the one used by the NEC PA241w and Dell U2410 - these offer a wide gamut color space inclusive of 100% or close to it of the sRGB and AdobeRGB color spaces. The Samsung and LG use a 6bit TN TFT LCD panel and they likely cover sRGB and maybe stray into AdobeRGB a bit but not 100%. The Eizo CG221 you mention as having viewed, uses an older S-IPS or AS-IPS panel and it is wide gamut.. 24 inch 1920x1200 native resolution. 8bit H-IPS panel, LG pn LM240WU4-SLA1.