lg w1924s start button blibking for 15 minutes

[acc3l3ro]

My monitor (lg flatron w1924s) is acting odd. When i press the on button he does not turn blue (the button doesnt turn blue) instead it starts blinking on and off for 15 minutes and after that the monitor works fine. Whats wrong with it? Pls just help understand the problem so i can know if i can repair it or just buy a new one ( witch is expensive for me now). Thx and i hope not to disturb you much. Sorry for writting errors...

[budm]

Re: lg w1924s start button blibking for 15 minutes

First thing to do is to open up the unit and inspect the board for any caps with bulging tops.
Your board will be similar to this example:
http://s807.photobucket.com/user/bud...?sort=3&page=1

Bad caps example:
http://s807.photobucket.com/user/bud...?sort=3&page=1

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

I will do this when i get home.

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

Well a have a bolged cap. And its the only one that its bolged. The rest look ok. So the cap is an elite 1000mf/16v. Should i replace this one only or all of them?

[tron]

Re: lg w1924s start button blibking for 15 minutes

all of them,
except the big one
on the primary side,
use good caps
for replacement

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

Ok so i have 8 caps to replace. 30 minutes and i am home fixing it. I have hermei, elite and xindecon. I bet these are from China.

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

from all 8 caps that i have only 1 is the same. For example. I have 1mF/450 and he gaved me 1mF/400. i have 470mF/25 he gave me 470/35. I have 22mF/50 he gave me 22/63. Is it something wrong with me that i think i should replace only with the same value or it is ok if i replace them with what he gave? Pls heeelp

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

I have changed the bad cap and now the monitor stays white only

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

You can go a voltage higher so they are good.
The Big cap would be better at 450v but 400v is acceptable.
If the big cap you have doesnt look bulged or leaky try without changing it as tron said.

[budm]

Re: lg w1924s start button blibking for 15 minutes

It seems like you did not properly seat the cable between the logic board and the LCD panel where the T-CON board is, or the T-CON board is dead, or the logic board is not sending the 5V (or 12V) to the T-CON board.

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

Do you have a pc connected to it?

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

i have turn it on. Works but... I see vertical white lines. Its like this... One line in coloured and one is white. And it goes all over the monitor. Could it be cause i have changed only that bad cap?

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

Could be a faulty screen - was it your monitor - did it work without lines before?
If so, take off the lvds cable mentioned by budm clean both ends (if a flat cable use an eraser) then replace.

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

it worked ok this morning except that blinking start button witch is solved now. I have noticed something now. When the screen is on black colour i can see alot of little green dots all over.

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

If you have cleaned the lvds - check any other cables are secure and try again
Have you got a PC connected - is the resolution correct?
Then I would put in the rest of the new caps- that will give a good base for any more testing.

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

the resolution is corect. All starts ok. Only those dots. I have placed my fingers on that lcd plug. Could it be cause of that?

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

Unlikely, check the cable from the PC to the monitor is ok.
Do you get dots on White Yellow Blue Red Screens?

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

those green dots are observed only when the monitor is in save energy mode or when not connectec to a pc. It has to be a black screen so i can see them. Once i connect the pc to it those dots are gone but the monitor goes like... one vertical line is coloured and one white. A line mean a vertical row of pixels from top un to bottom down. One line coloured and one white. The rest is ok. Resolution ok and all the buttons work.

[acc3l3ro]

Re: lg w1924s start button blibking for 15 minutes

I get only white lines like ive said and green bots when its on save energy mode or not connected to pc.

[selldoor]

Re: lg w1924s start button blibking for 15 minutes

If you have tried cleaning all the cables , do you have another monitor you can try on the pc or anther pc/laptop you can try this monitor on ? That will rule out a video card/processor problem. You may have damaged the panel taking the monitor apart causing the lines. I dont know what is causing the green spots.