Re: Lenovo L2440pwC "2secs to black"



I finally had time to actually do this today, even though I got the second build about a week or so ago. Sucks when you don't have "tool shop"... condo living; I have to store this 24" LCD in a dresser drawer..

Anyway. I tested as recommended, and regardless of testing the top or the bottom, the same thing. The two laps would light up for a bit, then go off. I even captured [URL="https://www.dropbox.com/s/k33cwxyqmtv5nea/2015-10-04%2021.21.51.mp4?dl=0"][B]video[/B][/URL] of this....

Re: Lenovo L2440pwC "2secs to black"

Thanks for the feedback on this. I haven't had much time lately to try this and I didn't have a second lamp, I'm hoping that next week I can try to troubleshoot as you indicated above and see what results I get, then go from there! Will then post the results.

Thanks again

Re: Lenovo L2440pwC "2secs to black"

Thanks for the feedback. I will explain in a bit more detail what I did.

The picture in my second post is the output to the monitor bulbs. There are two of these connectors on the board (can be seen here, left side [url]https://www.badcaps.net/forum/attachment.php?attachmentid=118627&d=1442080380[/url])

I unplugged the monitor bulbs from these connectors. I'm not sure what the colors of these plugs mean, blue+gray, and white+red.

I used a 13W CFL with a tail, and plugged it in each pair:...

Re: Lenovo L2440pwC "2secs to black"

Ok, so after reading the CFL post I decided to make one, I had a 13W bulb in one of my closets that I took apart in order to use for testing.

This monitor has two outputs for the light tubes, they look identical. When using the bulb to test and switching power on:

1.With the wires inserted in WHITE and RED (picture reference), the bulb lights up all the way (then off in 2sec).

2.When I have the wires inserted in BLUE and GREY (picture reference), the bulb lights up 1/3 of the way and it...

Hi all,

I just picked up a Lenovo L2440pwC monitor from work, it was left outside the IT office door (this is what they do when they get rid of stuff they don't need/doesn't work, etc).

It is exhibiting the "2secs to black" behaviour exactly; I turn it on, it shows the logo for 2 secs, then it goes black; if I shine a light on the LCD, I can see that the info is being displayed.

I used this post as a reference, but there is another issue with the LCD in that, not the 2sec to black: [url]https://www.badcaps.net/forum/showthread.php?t=27034[/url]...

Re: New Members - please post your introductions here

Hey all! I like to fix stuff, rather than throw it.

Last thing I fixed was my RT-N16 router which had a bad cap; working like new now!

I am now in possession of a 24" LCD which isn't working correctly so I found a thread on here which I'm hoping will assist me with a fix.

Cheerio!

Re: Lenovo ThinkVision L2440pwC stays black

Good post here!

I recently got one of these units at work, when I plug it in I quickly see the Lenovo logo come up then the screen goes dark. I'm guessing it could be something similar.

Not sure if it's even worth the time to open this up and check it considering these days the monitors are pretty cheap.

Cheers