Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Thanks, they have them for $10 each.
Stingray75
Member
Last Activity: 09-19-2013, 02:26 PM
Joined: 06-25-2013
Location: Las Vegas, NV
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Finally got around to removing the lamps out of this monitor. The lamp is obviously bad. This monitor has double lamp assemblies. One on top and one on bottom. The part number on it is 522LD. Does anyone know where I can buy a new one of these?Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
I took a look at the 245BW this morning and the bulb connections are completely different. Is the next step now to look at the bulbs? Should I replace all 4?Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
OK, I have VGA connected now. Still two seconds to black but now everytime I change the video mode on the laptop the backlights come back on and it does two seconds to black again. IAW turning the video off and back on again makes it go through another two seconds to black cycle without turning the power off.Last edited by Stingray75; 07-02-2013, 01:52 PM.Leave a comment:
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Re: Samsung SyncMaster 2443BWX 2 Seconds to Black Times Two
This title makes more sense.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
I answered some of my own questions above. I found out that it is very easy to lift the frame off the monitor and configure the test set up so that the front panel controls will reach the connection on the power supply. As you can see from the pic the two connections are reversed now. Symptoms are exactly the same. The arcing sound in the bottom right of the screen is still there or atleast it was the first couple of times I powered it up. It doesn't do it everytime. With the logic board disconnected...Last edited by Stingray75; 07-02-2013, 12:55 PM.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
OK I will try it. But what about the small connector going to the front panel controls? Will the screen turn on without that connected?
Also, I have a bad SyncMaster 245BW taken apart right now. Is the screen the same? Can I use it for ops check?
With those connectors off what reaction from the monitor am I looking for? Thanks for your help guys.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Rtech, tried doing what you asked but couldn't arrange the screen in such a way that all the wiring would reach. I was able to plug the bottom backlights into the top connector without the other one plugged in and vice versa. The static noise heard at the bottom right of the screen went away of course without anything plugged into it. When plugged into the top connector of PS it still made the noise but didn't seem to be as bad.
The other thing I noticed is that even with the bottom connector unplugged...Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Sorry!! Just wanted to make sure I did what RetiredCaps asked me to do properly.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
What is the proper way to take voltage measurements on the power supply? I had to disconnect one of the cables to get my readings.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Rtech, both are 1K.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
OK, here are some pictures.
[url]http://www.jcbosworth.com/Photography/Macro/Macro-electronics/30243601_xJs8nd[/url]
Here are the voltages.
1. 5
2. 16
6. 5
7. 5
9. 2.9
10. 3.3
11. 2.8
12. 1.7
To get the voltage measurements I had to disconnect one of the cables. This can be seen in one of the pics. The monitor comes up for a few seconds then flickers and then goes black. I tried looking in with a flashlight...Last edited by Stingray75; 06-28-2013, 04:13 PM.Leave a comment:
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Re: Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
Thanks for the reply Retiredcaps. I will try to post some pictures today. Before I get the monitor back out and plug the power supply back in I was thinking that I would go ahead and replace at least the high failure caps on the board. I haven't found much on the site for this model of SyncMaster. It has power supply BN44-00238A. Does anyone have schematics for this power supply and the other boards in the monitor? ThanksLeave a comment:
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Samsung SyncMaster 2443BWX Comes Up, Goes Down and On and On
This monitor comes up like normal but then the display flickers and goes black. Five or ten seconds later it comes back up and does the same thing again. The blue light stays on the entire time.
I've already taken it apart and looked at the caps on the power supply. No obvious problems except for one cap that looks like it might be just barely starting to bulg. The caps are Samwha.
Is this a power supply problem or something else.
Thanks, this is my first post. -
Re: New Members - please post your introductions here
Hello All, my name is John. I've been an Amateur Radio operator since I was a child and use to work for the Air Force doing component level repair. I passion is figuring out problems and resolving them. Mostly automotive which is my primary hobby. So you might would guess that I love working on complex electrical problems on cars. You would be right. I came to this site looking for help with a computer monitor.
Thanks, it seems to be a great site.Leave a comment:
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