Re: Mystery Resistor - LG W2452T Power Supply

Figured I'd add one more update...

So the monitor is working right now and I plan to just not mess with it even though it's pretty clear that I haven't "fixed" anything. Swapped out a bunch of capacitors? Yes. Jingled some parts around? Yes. Permanent fix? No.

After I got it back up and running, I pressed on one of the lower corners of the monitor to tighten the plastic face down and the power shut off again. Pressing the power button did nothing.

It may be the power button board.....

Re: Mystery Resistor - LG W2452T Power Supply

Started taking it apart again (which is a huge pain with this monitor) and it came on again! I think it may actually be the board that has the power button on it. It came one when part of the actual screen hit that board.

Hmmm... for now the monitor is on and working, so I'm going to leave it. Not sure what else to make of it.

Re: Mystery Resistor - LG W2452T Power Supply

So I soldered the resistor back in since it sounds like it may either be 10M or not matter (or both). I then plugged it in and checked the 5v power and it did read 5.15v. Then I plugged the board back into the monitor shell and it turned right on!

I got excited and put the whole monitor back together (which required unplugging it) to find that it wouldn't turn on again (these are the same issues that have continued to plague me... sometimes it'll turn on and then I can't do anything to get it on again).

...

Re: Mystery Resistor - LG W2452T Power Supply

Awesome, thanks guys. I wonder too if my multimeter then just won't read a value as high as 10M... the highest setting is 2000K.

I'll take several pictures of my board tonight and double check all the pin values.

Re: Mystery Resistor - LG W2452T Power Supply

selldoor,

I don't think it can be 10M because if it is Brown, Black, Blue, Gold then the last ring would have to be Brown or Gold but it doesn't match either of the other rings you've already labeled.

Re: Mystery Resistor - LG W2452T Power Supply

Budm, thanks.

Do you have suggestions on other parts to test? I haven't plugged the power supply back into the monitor since replacing the capacitors, but since the old ones all tested fine I didn't assume that would change anything. I can put the bad resistor back in (or leave it out) and test again tonight as is. Is it possible that bad capacitors could registers the proper capacitance on a cap meter but still cause problems?

I'm not electronics expert or have any experience with working on power supplies......

Hello all, I'm new to this forum so apologies in advance for any bad etiquette. I read through the forum rules, hopefully I do okay, but anyways here's my situation...

I'm posting this here because I've read many posts that have been helpful thus far in troubleshooting my problem and hope that the electrical expertise can figure this one out for me. I have a LG W2452T monitor that has had issues turning on over the last year or 2. It is almost always running and just goes into idle but the few times it has been unplugged for various reasons it always has issues coming back on. The...

Re: New Members - please post your introductions here

Hello all.

New to this site but have enjoyed reading a lot of information as I've been recently trying to troubleshoot the power supply on my LCD computer monitor. I have no formal electrical training but enjoy tinkering and know enough to get myself in trouble!

Matt