Question about Samsung SyncMaster 204B 20.1" LCD Monitor

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Monitor not working

I have two Samsung 204b Monitors that I have set up as dual monitors. They have worked correctly for over 6 months, just yesterday one of the monitors began to lose brightness and begin to flicker, I have checked all the cables and re-started my computer. Now today the monitor will not turn on. The power button is flashing. It seems that my mouse can get lost in the other monitor if i drag it in that direction. I have tried removing and attaching in the display panel. Is my monitor just broken or is there something I can do ?

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Re: Monitor not working

It does sound as if its ?broken? but some quick tests will help figure out whats going on. When the other monitor dies switch where it plugs into the PC with the other monitor. If the problem follows the monitor then the PC end is OK and we shift our focus to the monitor. Some monitors have video cables that will disconnect from the monitor. If that is the case with your?s then try swapping cables, again does the problem follow the cable or stay with the monitor? If it follows the cable then just replace it, if not then the problem is definitely in the monitor as you suspected. If you monitor is less than a year old (or whatever your warranty is) contact Samsun tech support for a warranty replacement. When you call make sure you outline the process you went through, it will make the process quicker. If its older then what you do next depends on you, if you have the skills and some basic equipment you can try troubleshooting. I usually recommend that the typical user either take their monitor to the local authorized repair shop for this sort of thing. Most users simply do not have the experience or tools to take on the job.

Posted on Jul 16, 2007

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This is a common problem with the Samsung 204B units that have been in service for a few years. Parts called capacitors in the power supply start failing and causing the board to not start correctly. The blinking power button is just the power supply restarting over and over. The monitor is easily repairable, you just need to replace the 5 capacitors that have failed. Here is a link to a page that shows how to open the monitor, get to the power supply board and what to replace.

I hope this helps, if so please rate my solution.


Sep 17, 2011 | Samsung SyncMaster 204B 20.1" LCD Monitor

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When I attempt to bring it back up, or turn it on,monitor screen stays black long time, then flickers, then slowly, ever so slowly, comes into view. Works ok at that point. Happening every time now, and...


The Samsung 204B monitor have a know issue with failing power supplies that cause the exact problem you are having. At first they are a little slow to display a picture and the more you keep using it the longer it takes for the display to come on. The repair is simple if you can solder. Here is a link to a site with additional information on this repair. This Samsung 204B monitor is a great unit with a simple to solve issue. No need to trash a good unit.

I hope this helps, if so please rate our solution.


Jul 04, 2011 | Samsung SyncMaster 204B 20.1" LCD Monitor

2 Answers

I am looking for the pdf file Samsung 204B fix

A full repair guide with dis-assembly and repair instructions is available at:

I hope this helps, if so please rate my solution.


Aug 03, 2010 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

Monitor flickers and turns off. samsung syncmaster 204B.

this is very frecuent in all monitors or tv's lcd .... turn on 3 seconds and off the capacitors need to be replaced y sugest a technician

Sep 16, 2009 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

One of Two Samsung 204B Monitors Not Comming Out of Sleep

Hello Steve,

The problem is caused by a bad power supply board about to die. Check our web site at: We have a step by step repair guide for the 204B / 204T monitors that should get you back going. If you don't want to do the repair yourself we do offer a repair service for $30 + return shipping.

I hope this helps, If so please rate our solution.

Corporate Computer

Aug 29, 2009 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

Samsung 204B random blank screen

I too have a dual monitor Samsung SyncMaster 204 setup. My monitors started flickering, then a week later had turn on problems like your describe. I found a fix on this fixya website and followed the fairly techie suggestion. It worked. I wrote up a .pdf set of instructions so others might also benefit. Hope this helps. Doug

Feb 07, 2009 | Samsung SyncMaster 204B 20.1" LCD Monitor

2 Answers

No Display on my Samsung 204B monitor

If you know how to open it up and get to the power supply you will find three capacitors 2-820uf and 1-330 @ 25vdc 105o.they will have puffed up tops replace them. FYI the monitor has a 3 year warranty.

Dec 12, 2008 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

Monitor Splitter

If it works it will only display the same image. There will be a voltage drop, which may cause problems.Which piece of hardware has the dual monitor setting?

Jun 18, 2008 | Samsung SyncMaster 204B 20.1" LCD Monitor

1 Answer

Unclear Display

Goto cotrol panel/display/settings and set the resolution to 640x480. Make your you are using the video driver from the manufactorer for your video card. Windows generic drivers do not work well for all monitors. When you get the proper video driver you can reset your resolution back to a higher setting.

Apr 28, 2008 | Samsung SyncMaster 204B 20.1" LCD Monitor

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