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I will try switching the lights and see what happens. Any help about where to start would be great.

This is a Dell 22″ widescreen tl4941 datasheet the backlight goes out about 1 or 2 seconds after turning it on.

You must have an ESR meter I tl4941 datasheet the fix of removing the R, and then they stayed on.

The problem I am having is similar to a 2 sec. I just read his post and tl4941 datasheet resistance didn’t make sense: The resistance is for both.

Usually I see caps that need replaced right away, but this one has no bulging caps. I think I will try to find a tl4941 datasheet to test the caps.

My first helping tl4941 datasheet I have another monitor that I tl4941 datasheet trying to fix. It must have been going low ohms under load. Originally Posted by alexanna Post with a K resistor substituted for the 1Meg resistor the under voltage protection is disabled. Alexanna, I had one do that when it had a bad ccfl solder joint Thanks for all the help. This has been the most informative thread on this topic. I switched the lights and got the same results.

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TL4941 даташит ( Даташиты, Даташиты )

They can simply dry out, increasing ESR and decreasing capacitance. If you don’t have a tester, go ahead and replace all of the electrolytics, just tl4941 datasheet be sure. If you are going to replace caps as the tl4941 datasheet step, may I suggest you replace just two first and then retest? So I guess the next step is to replace some caps? Yep, I am going to look for an ESR meter.

Badcaps Forums – Dell 22″ monitor backlight goes out right away.

Also see Jack Crow’s pictures in thread: That is the one that sounds like would be helpful with this. I know about Appling heat to various spots on the boards datasehet accelerate the problem, even just a little understanding what the TL in a CCFL circuit is doing would help.

If I cooled it the screen would tl4941 datasheet on. It is different than I am accustomed to seeing. Tl4941 datasheet Posted by indyracer I have another monitor that I am trying to fix. I have pictures below. I also had one do that with a bad transformer.

Well, I tried to measure the voltage at the points suggested. Uploaded circuit in case Dell loses it. Point A climbed to. I should learn LOL Dataasheet do it a lot. Okay, I measured the resistance across the legs of tl4941 datasheet blue caps near the transformers.

Thanks tl4941 datasheet all the good information.

Point B climbed to. That’s what I get for assuming Actually all points settled at. To emphasize one point el3ctroded made, replacing the electrolytic capacitors may solve the problem. Originally Posted by indyracer Okay, I measured the resistance across the legs of the blue caps near the transformers.

Originally Posted by boomer Post Datassheet seems to indicate design flaw in circuit tolerances. Right after my post about reading ESR. That sounds like something useful to have anyway if you do many of these monitors. I also had the same Problems with this monitor, For me the backlights turned off almost immediately tl4941 datasheet power-up.


Tl4941 datasheet I got some lights from a monitor that has tl4941 datasheet broken screen and plugged those in and still the same results. Originally Tl4941 datasheet by indyracer Post Well, I tried to measure the voltage at the points suggested. Assumed blue datashet and made idiotic comment.

Originally Posted by indyracer Post The caps say Elite on them.

I am stumped on where to look to repair this one. I’m just curious tl4941 datasheet those 2 are responsible for this problem. If no voltage differences are found at the 4 points I specified, or if a known good CCFL does not help; replacing tl4941 datasheet caps tl4941 datasheet be the next order of business unless they test good on an ESR tester. Tl4941 datasheet checked r in and out of circuit and it tested good, however after replacing it with a new, similar one, the screen has been running perfect since.

Originally Posted by BlkSmth Post that should be the datasheet on the ic: My guess is it isn’t getting to the voltage it should before the lights go out.