Reparing a Samsung 2493HM 24″ LCD monitor
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 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 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.
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.