What Should I do with Good 23" LED Monitor Screen; Just Bad Computer Board on it

[oathmark1]

I have an LG Flatron E2342v-BN 23" flat screen LED monitor that I picked up for free because it was just turning on and off.



I looked into it, and the LED backlight is good, the long, narrow computer board on the back of the screen is good, and everything is good....

....except for the main computer board.



The main computer board makes a rising and "snapping off" hissing sound, and when the "power button computer board" and the "LED backlight" is connected to the mobo with power running in it, the screen and power button is lighting up and clicking off. Also when the everything is disconnected from the mobo except for the power, the mobo is making that hissing noise that rises and falls off over and over which controls the on/off action on the rest of the monitor.





What could it be, and how could I test it?

Because I see the capacitors are all good, and there are no soldering points that are bad, crossed, broken off, and all of that, I believe the mobo is shot.



But it's a very good monitor besides the mobo, so I'm wondering if I could find a cheap mobo to install into it, and make it useable on the computer.

 

[USAFRet]

Find one with a broken screen.
Swap parts around until you have 1 working monitor.

 

[jaslion]

I have an LG Flatron E2342v-BN 23" flat screen LED monitor that I picked up for free because it was just turning on and off.



I looked into it, and the LED backlight is good, the long, narrow computer board on the back of the screen is good, and everything is good....

....except for the main computer board.



The main computer board makes a rising and "snapping off" hissing sound, and when the "power button computer board" and the "LED backlight" is connected to the mobo with power running in it, the screen and power button is lighting up and clicking off. Also when the everything is disconnected from the mobo except for the power, the mobo is making that hissing noise that rises and falls off over and over which controls the on/off action on the rest of the monitor.





What could it be, and how could I test it?

Because I see the capacitors are all good, and there are no soldering points that are bad, crossed, broken off, and all of that, I believe the mobo is shot.



But it's a very good monitor besides the mobo, so I'm wondering if I could find a cheap mobo to install into it, and make it useable on the computer.

Find one with a broken screen.
Swap parts around until you have 1 working monitor.

He can also get a working one for as little as 70$ on ebay.

 

[oathmark1]

I have an LG Flatron E2342v-BN 23" flat screen LED monitor that I picked up for free because it was just turning on and off.



I looked into it, and the LED backlight is good, the long, narrow computer board on the back of the screen is good, and everything is good....

....except for the main computer board.



The main computer board makes a rising and "snapping off" hissing sound, and when the "power button computer board" and the "LED backlight" is connected to the mobo with power running in it, the screen and power button is lighting up and clicking off. Also when the everything is disconnected from the mobo except for the power, the mobo is making that hissing noise that rises and falls off over and over which controls the on/off action on the rest of the monitor.





What could it be, and how could I test it?

Because I see the capacitors are all good, and there are no soldering points that are bad, crossed, broken off, and all of that, I believe the mobo is shot.



But it's a very good monitor besides the mobo, so I'm wondering if I could find a cheap mobo to install into it, and make it useable on the computer.

Find one with a broken screen.
Swap parts around until you have 1 working monitor.

He can also get a working one for as little as 70$ on ebay.

I want to sell this not use it.

 

[oathmark1]

Find one with a broken screen.
Swap parts around until you have 1 working monitor.

I think the LED kind is the rarest kind, right? I can't imagine finding one that would fit the wire strip from the screen, the power braid to the LED strip, and the power braid to the power button and adjustment array. I'm all for splicing wires etc in order to improvise.

I looked up the price on something that could go in it that is similar on ebay, and they are priced 4x or more out of the market.

 

[USAFRet]

Find one with a broken screen.
Swap parts around until you have 1 working monitor.

I think the LED kind is the rarest kind, right? I can't imagine finding one that would fit the wire strip from the screen, the power braid to the LED strip, and the power braid to the power button and adjustment array. I'm all for splicing wires etc in order to improvise.

I looked up the price on something that could go in it that is similar on ebay, and they are priced 4x or more out of the market.

This is Troubleshooting and Service Desk 101.
How much time do you want to invest in "fixing" a busted monitor?

Find an identical one with a broken screen, and swap parts.
or, stop wasting time on an unfixable part.

Can it be fixed? Maybe.
How much time do you want to invest in it?
How much can you sell it for, if fixed? $50?

 

[oathmark1]

This is Troubleshooting and Service Desk 101.
How much time do you want to invest in "fixing" a busted monitor?

Find an identical one with a broken screen, and swap parts.
or, stop wasting time on an unfixable part.

Can it be fixed? Maybe.
How much time do you want to invest in it?
How much can you sell it for, if fixed? $50?

I'm tinkering, and I want to learn anything I can about all of these things such as what are the limits of what can be done, costs, time, electrical science, computer science......

So while I may sell it for $40, the point at this stage in my "hobby/practice" is not much profit at all. I'm a business minded person, but I'm only researching now probably for another year before I really start to develop routines etc, and hitch it to market.

I really would like to know how to fix the thing or at least what is wrong with it.

 

[USAFRet]

We out here can't tell you how to fix it, because you're the only one with eyes on the problem.

 

[oathmark1]

We out here can't tell you how to fix it, because you're the only one with eyes on the problem.

Got it. It's the power adapter in the cord that is switching on and off and hissing.

This video shows a different monitor model, same LG brand, and the exact same main board with the exact problems including the hissing.

[video="https://www.youtube.com/watch?v=Kwwi06GGJ8k"][/video]