Tip & How-To about Mitsubishi WS-55513 55" Rear Projection HDTV
I had a problem with my Mitsubishi 55" rear projection TV not turning on and the green light in the fron was blinking non stop. My wife found this website and saw that other people were having the same problem, and there were some solutions posted. This guy named Bill was giving advice to someone called "Bishihater" about some capacitors on a "DM" board inside the TV that might have gone bad. After calling a service tech and getting a quote for "around $70 dollars to show up and look at it, and $275 in labor, plus parts", I decided to try and fix it myself.
I downloaded the service manual off of www.servicemanuals.net "as Bill had mentioned", so I could figure out how to take the TV apart. Then took the back of the TV apart, disconnect some choice wiring harnesses to give the board enough slack to come out far enough to remove the DM module. After I carefully removed the cover, the the module itself, I put the DM board in a static resistant back and went to radio shack, then Fry's electronics to find the (4) polarized 16v 1000mf radial capacitors that were clearly "bulging" at the top where the three relief grooves are. Had no luck at either store, but was able to find a Electronics supply store 10 miles from the house who had the right capacitors...Make sure you take the board with you and make sure that you get the right parts!! And that they fit where the old ones are, there are a lot of capacitors with the same rating that are much bigger than the ones that need to be replaced! I bought a $25 variable wattage (20/40watt) soldering Iron, some electronics solder, and a copper wick. I used the wick to take off as much of the old solder as I could, then while heat was applied to the connection I gently pulled the old capacitors away from the board. Paying special attention to the polarity I put the capacitors back where they went (the polarity is marked on the back of the board, and there should be a colored stripe down one side of the capacitor with either a plus or a minus in it). When soldering the capacitor prongs back onto the board be very careful not to put too much solder!! there are some other soldered connections right next to where you need to solder, hold the board at an angle and go slow. (I am by no means and expert, It might not hurt if the solder touches those other soldered connections, but I sure as heck didn't want to find out if it did!!). After I got all four capacitors back in, I plugged the DM board back in, making sure the the connections were fully seated, then put the TV back together. I stood back, anticipating a huge flash of sparks and a big puff of smoke, but instead when I turned the TV on, the light blinked again for about 70 seconds then went out. I hit the power button again, and BAM! The TV came back on!!! I was so happy!! Thank you Bill and Bishihater, you guys just saved me a ton of money!!! That was about a week ago that I did that, and I haven't had a problem since. I cleaned the lenses behind the screen also while I was doing everything, and the picture looks like new again!!!
Thanks again!! Hope this helps!
Posted by Cvdemick on
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