Repairing the Westinghouse LCM-22W3
If you have a Westinghouse LCM-22W3 or other monitor that uses the DAC-19M009 power supply that either has a blinking power light or a very dark picture then this should help get you back running. This power board is also used in the Viewsonic VG2230WM, Viewsonic VX2245WM and Viewsonic VX2235WM-05 monitors so the symptoms and solution will be the same. Below you will find a full walk thru on repairing your LCD monitor. To do the repair you will need the following tools: Soldering iron, de-solder braid, Phillips screwdriver, flat blade screwdriver. You will also need the following electronic parts: qty(3) 220mf 25v capacitors, qty(2) 1000uf 25v capacitors qty(1) 1000uf 10v, qty(1) 2200 10v and qty(1) 330uf 25v capacitors. We sell a repair kit with all of the parts for $15.00 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, then please use the service request link above.
Here we have a non functional Westinghouse LCM-22W3 22″ LCD monitor. This one has no power at all.
First you need to remove the power cable, signal cable and the stand. To remove the stand remove plastic cover and then the 4 screws as shown in the picture to the right. After the stand is off the you should be able to finish removing the case. Start the case removal by removing the 5 screws that hold the case together, there is one near each corner and one in the center at the bottom.
The case will pop open if you insert a small flat screwdriver between the 2 halves and apply a gentle pressure. There are plastic catches around the case as seen below, they will release with a little pressure. Once it starts opening just use your fingers and work your way around the screen.
Now you need to remove the metal shield from the electronics. Remove the screws as circled in yellow and unplug the backlight cables as circled in blue. Now you can lift off the metal shield and set it to the side for later replacing.
Here you see both electronics boards, the controller board and the power supply/backlight inverter. Remove the three screws circled in yellow.
The capacitors you need to replace are circled in the picture on the right. Use solder braid and remove the bad caps and solder in the replacement caps. Be sure to replace them in the proper polarity, you will see a stripe on the side. The stripe is the negative lead. Just reinsert the new caps with the stripe going the same direction as the old ones come out. The DAC-19M009 and DAC-19M005 are the same one has the audio and the other does not. The values and part locations are listed here:
220uf 25v – Number 1,3 and 7
1000uf 25v- Number 2 and 5
1000uf 10v- Number 6
2200uf 10v- Number 4
330uf 25v – Number 8
After the parts are replaced just reverse the procedure to reassemble the case. Now apply power and you should have a fully functional monitor again.