This repair guide will show you how to open and repair a Samsung 2493HM 24″ monitor. The monitor we have here has no power but the power supply can cause several type of problems such as slow to show picture, a flashing or flickering display, blinking power light and no display, or no power at all. The Samsung 2493HM uses the BN44-00195A power supply board made by Dong Yang. To do the repair you will need the following tools: Phillips screwdriver, soldering iron, desolder wick or solder sucker and solder. You will also need the following parts:

Qty (2) 1000uf 35v
Qty (1) 2200uf 10v
Qty (1) 470uf 35v
Qty (1) 1000uf 10v
Qty (2) 10uf 50v
Qty (1) 2.2uf 50v
Qty (3) 47uf 50v
Qty (1) 22uf 50v

First you will need to remove the stand.

Now turn the monitor over so you can get to the screws on the back. Here you can see the four screws that need to be removed.

Turn the monitor back over and lift the bezel up from the center of the monitor across the bottom, the bezel will lift up. Work your way around the whole bezel until the front and back separate.

Once the two halves are separated you need to flip the unit over again and remove the back plastic case half.

Now you will need to remove the control panel wires and the inverter wires as seen in the two pictures below. The connectors have latches that need to be released before they can be pulled off, just press down and the plastic tab and pull. The connector should come off fairly easily once the tab release is press, do not pull to hard or you could damage the connection.

Now you can lift the metal shield box and unplug the display panel as shown here. The connector has clips on each end that you will need to press in to release.

Now you can fully remove the metal box that holds the power supply board and control board. Turn the box over and remove the four screws as shown circled below. After the screws are out you can pull up the metal bracket at the top of the board, it is held in by the two screws and the padded tape.

Here is the power supply board with the bad capacitors circled. You will need to replace all of the capacitors on the board not just the ones showing failure. Be sure to use the proper rated parts on the repair or you will have a failure again that could cause additional damage to the monitor. Here is a page that describes what capacitors are and which ones to get for the repair, Capacitor page.

The values and locations are as follows:

CM851, CM852 1000uf 35v
CB853 2200uf 10v
CM855 470uf 35v
CM857 1000uf 10v
CM814, CP804 10uf 50v
CB805 2.2uf 50v
CB809, CB806, CB812 47uf 50v
CB804 22uf 50v
When installing the new capacitors be sure to check the polarity. The capacitors will have a stripe on one side, that is the negative terminal. The board will have the holes marked for positive and negative. The best thing to do is as you remove the old part, insert the new replacement and then move to the next location.

After replacing the faulty parts just reassemble the monitor and you should be back in business.

We carry a repair kit with all of the parts for $16.95 with free shipping.

This is not guaranteed to solve all problems but in most cases this is the issue with this model.

If you don’t want to do the repair yourself, use the service request link above. Most monitor repairs for this model run $40-45 parts and labor plus return shipping.

If you have any questions about repairing this model please use our forum section here.

33 Comments on Reparing a Samsung 2493HM 24″ LCD monitor

Mark on Sat, 30th Jul 2011 9:33 am


What brand capacitors do you use when repairing these monitors?

CCL_TECH on Sat, 30th Jul 2011 9:36 pm


We exclusively use Nichicon and United Chemicon Capacitors in our repair kits and in house monitor repairs. Here is a page with more details on which capacitors to use: http://www.ccl-la.com/blog/index.php/capacitors/

Don Jeffries on Thu, 4th Aug 2011 5:22 am


I recently ordered a power supply repair kit from Corporate Computer. While waiting for the kit I opened up the monitor (Samsung 2493HM) to make sure I knew what had to be done. I discovered that some of the capacitors are anchored with a greenish hard blob. What is the best way to handle a capacitor with this stuff on it?

CCL_TECH on Thu, 4th Aug 2011 6:59 am


Hello,

That material is just a glue to hold the part in place during assembly. You can use a small flat bladed screwdriver to pry off the glue and remove the old capacitor.

Don Jeffries on Thu, 11th Aug 2011 7:14 am


Thank you for your prompt response to my question. I successfully installed 12 capacitors in the Samsung 2493HM power supply. It now works perfectly. I now wonder why Samsung brushed me off. I tried to get some answers from them and they said it was the DMI cable or my graphics card. It seems obvious that bad capacitors were used

Paul on Sat, 5th Nov 2011 1:48 pm


I was a bit reluctant to try this myself; but since the screen was broken anyways & repair services in the Netherlands charge almost the price of a new screen; I decided to give it a try! It took me close to one hour but i managed to fix the screen!

Ed Grigson on Sun, 22nd Jan 2012 3:21 am


Brilliant walkthrough. My 2493HM monitor died about a month ago and while Googling for a repair shop I found your site. I’ve never soldered anything in my life but after buying the repair kit and giving it a go my monitor is now back and working fine! Many thanks for saving me money and giving me the info I needed to learn something new!

Wilhelm Schickgramm on Sat, 28th Jan 2012 10:33 pm


Bought the kit (Samsung 2493HM), installed the kit, monitor back in action.
Highly recommended company, cost-effective, well documented, customer service was not needed.
Thank you kindly.
Wilhelm Schickgramm
http://www.pianoforte.ca

CCL_TECH on Sat, 28th Jan 2012 10:53 pm


Great! Congratulations on your repair job. Another unit saved from the trash pile.

Ryan on Mon, 30th Jan 2012 11:22 pm


I recently purchased the Samsung 2493hm repair kit and installed it. It worked perfectly!

Now I want to order two more but the site tells me the product is not available. Is the kit out of stock?

CCL_TECH on Mon, 30th Jan 2012 11:35 pm


Yes,

There was a capacitor value that was out of stock but we received our shipment and just put them back in stock. They should now be orderable.

Don Jeffries on Wed, 1st Feb 2012 9:00 am


After repairing the Samsung 2493HM monitor with the 12 capacitor kit, I was very happy with its performance. Now however, after 5 months of flawless service, the screen goes black and makes a popping or clicking noise and sometimes comes back on and sometimes it doesn’t. I opened it up and checked for obvious evidence of arcing or shorting but found nothing. The capacitors all look good. No bulges. When I put it back in service it worked for 2 or 3 weeks and went out again. Now I can only get it to work for a day at a time, each time I remove it from my system and use a spare monitor for a while and then reattach the 2493HM it comes back to life for a while. Is this an indication of another problem with the power supply? Do the symptoms indicate another known problem?

CCL_TECH on Wed, 1st Feb 2012 9:46 am


Hello,
The popping or clicking noise sounds like you have a weak solder joint on the power board somewhere. Remove the board and resolder the connections to the transformers that are near the back light plugs, Also resolder the plugs themselves to make sure they don’t have bad solder joints. These power supplies have a over current protection circuit and if you have weak solder joints that can cause excess current draw which would shut the board down, unplugging the unit will allow the caps to discharge and the circuit to reset. Check this and get back to us with the results.

Don Jeffries on Mon, 6th Feb 2012 8:19 am


I inspected and reheated all of the capacitor joints and the transformer joints while wearing magnifying goggles. I found no evidence of bad solder joints. I then reassembled the monitor and put it back in service. It started right up in a normal fashion, but the next day when I started it up the screen went black just like before. The only pattern I can find is when starting cold, the Microsoft screen comes on then the user screen then when the desktop starts and the hourglass is going the screen goes black. Sometimes if I lightly tap the back cover it will come back on. When it comes back on sometimes it makes a loud chirp, and sometimes it doesn’t. Once it running, it is good for the rest of the day. It sounds like a loose connection that tightens up when warm, but I have no idea where. Thank you for your help. This is the best hardware support I have ever experienced.

WhiteSites on Fri, 9th Mar 2012 11:48 pm


I didn’t think this was going to work. All my capacitors looked fine. But I bought the kit and tried it anyway. Screen is perfect now. I wrote about it on my blog. Thanks for the great repair guide!

BMac on Sat, 14th Apr 2012 12:28 am


So I was looking into this. My monitor for the past couple days started going to black screen and slowly flashed the power light. I read through this “how to” and figured why not disassemble and take a look. I found one particular capacitor to be bloated at the top and was wondering if i really need to get a full set of capacitors to fix the PSU. Or if chances are good that I can just replace the single bloated capacitor and It will all work out fine? I say this because since it is Friday I was hoping to quickly pick up a couple capacitors from a local store and do this only to find the specific capacitor was not available. Thoughts?

CCL_TECH on Mon, 16th Apr 2012 3:17 pm


Replacing a single capacitor may temporarily “fix” the problem but the other capacitors will still be very weak and the power supply will be over driven trying to keep the correct voltages on the outputs and may get damaged. It is always best to replace all of the capacitors on a power supply board.

BMac on Mon, 30th Apr 2012 1:56 pm


Received the capacitors today. I have never soldered before. I watched a youtube tutorial video and after about 2 hours I had everything finished. With fingers crossed I turned it on and It powered up. Thanks a ton! I now have my monitor fixed cheaply with only minor injuries. This is a perfect guide! My suggestions to those new to soldering and attempting this, wear gloves and have a steady hand. Good luck and thanks again.

Anders on Sat, 19th May 2012 2:35 pm


Received the capacitor-kit, replaced them and with the bad ones and my monitor came to life – great service!

caz on Sat, 26th May 2012 8:13 pm


Received my repair kit in the mail today – wasn’t expecting it as soon as it came. Just as others have said above, after watching a quick youtube vid on replacing the caps
(which was easier than expected, took :30 mins) my monitor is back to working! w00t! Thanks much!

cheers,

tlm on Fri, 13th Jul 2012 10:25 am


My thoughts:
1. The repair came quickly & exactly as advertised.
2. The guidance installation web page was solid. I would watch
polarity carefully, capacitor type carefully, and solder drippage carefully
3. Duration — not 30 minutes for me. I’m not skilled electronic board guy — it took 2 hrs of careful work.
4. Overall — thank you very much for this product and the guidance. The monitor works just as it always has — sweeeeeeeeet!
take care.

drewrob on Thu, 19th Jul 2012 3:26 pm


Sounds similar to my problem but I have a model 2333hd. Does the kit work with that model as well?

admin on Thu, 19th Jul 2012 3:35 pm


Hello,
The 2333HD uses this repair kit:

http://www.ccl-la.com/catalog/product_info.php?cPath=21_33_68&products_id=205

Teddy Banks on Tue, 25th Sep 2012 5:50 pm


Does the Samsung 2494 SW have the same issues, mine went off, will not power up. Thanks

CCL_TECH on Fri, 28th Sep 2012 10:28 pm


Hello,

Sorry for the later response. Your monitor should still be under warranty from Samsung, that model has a 3 year parts and labor warranty that should still be in. Check the date on the back of the unit and then contact Samsung through their website to arrange warranty service.

Lee on Sun, 30th Dec 2012 9:39 pm


I install the Caps Today and All went A ok the only problem I had was the yellow goop on the cap. Thank for the help and I hope this gets me through to a IPS or OLED Monitor.

Rick on Tue, 29th Jan 2013 4:38 pm


Can someone list the silkscreen codes for each of the capacitors on the board.

I was careful to write them down as I removed the caps but I would feel more comfortable if I saw a list that showed the code on the board for ea cap.

I have the following:

CB853 2200uF 10V
CM851 1000uF 35V
CM852 1000uF 35V
CM857 1000uF 10V
CM855 470uF 35V
CB809 47uF 50V
CB812 47uF 50V
CM806 47uF 50V
CB804 22uF 50V
CP804 10uF 50V
CM814 10uF 50V
CB805 2.2uF 50V

I am particularly keen to be sure the 22 and 2.2 uF caps are correct. I originally mark them both as 22 and then when I realized one was 2.2 I could not quite recall where each went.

Dennis on Thu, 4th Apr 2013 5:08 pm


Thank you for putting out great information on Samsung monitors repairs.
My monitor was going black and the blue led was constantly blinking and no screen or solid blue no screen and came back sometime slapping the right side of the monitor. A good tech will always give it a slap just to see if it’s a cold solder joint.
I ordered the kit and replaced the caps, and soldered the all the lugs on the coils and transformers. All is working as of today it’s been well into 24 hours. I have some ghosting going on and wondering do I need to re-calibrate the monitor. If so, How and what is the process?
Thanks again!

Joe Bar on Fri, 5th Apr 2013 1:28 am


Great topic. does this replacement of capacitors also solve the ‘not working touch buttons?” Tia

Joe Bar

Jodi Rhuland on Sat, 6th Apr 2013 4:57 pm


Can I buy a power board for this monitor?

Thijs on Sun, 14th Apr 2013 5:37 pm


Thanks for this tutorial!!!

I replaced my 2200µf cap and it’s working fine now

Thijs on Sun, 14th Apr 2013 6:16 pm


the guy in my local electro shop knows about these faulty samsung power supplies. He didn’t have the 2200µf 10V and gave me a 2200µf 6.3V instead and said i didn’t have to worry about the difference. For now he is right, it’s working for about an hour. Do you think it may be a problem on the long run?

Felipe Andrade on Wed, 17th Apr 2013 10:35 pm


Hi, I’ve changed all the indicated capacitors but my monitor still not working. The blue indicator led failed long before the monitor stopped working, so I suspect the controls may be bad. Is there any troubleshooting script we should follow in case changing only the capacitors don’t work? Also, when I plug the power cord and flip the power switch on, it’s possible to hear a very low beep coming from the power supply. The beeping has an interval of about 1,5 to 2 seconds. Any idea?

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