Question about Hitachi 42EDT41 42 in. HD-Ready Plasma Television
I have an 42EDT41A with great sound but no picture. I took the back cover off and I noticed that the Main Control Board in the bottom of the 42EDT41A had an LED that constantly blinked to indicate a problem. Since I don't have the service manual for the 42EDT41A. I was wondering if you guys could help me diagnose the possible cause. I do know from researching your site that the 42EDT41A has a PCB problem, but no one has yet to state which PCB it could be.
OK I fixed mine. I took out the new bulb, and on the back side, there is a little tab on the right side of the lamp that should depress the safety switch. I think that once you take out the original bulb, the switch lever is weak and once you replace the lamp, the new one cannot depress the switch far enough. I built up under the tab (with some plastic from a pen pocket clip and some super glue)(after I took off the back of the tv to see what was going on) and it depressed the switch farther. I put it back together, and now it works. Saved a few hundred bucks. Good luck...
Posted on Nov 30, 2007
check your sdr boards. you can test them with a multi meter. they are known for going bad. what happens is the two caps by the output go bad on the power supply and they make the sdr boards burn out. you can replace the two caps and save lots of money. then please check out this web page http://www.hometheatershack.com/forums/hitachi/38229-hitachi-p50h401-led-flashes-3-times.html
This web page has info about repairing these. The 4 flashing lights maybe the x sus or the y sus but it's still a good idea to check the sdr boards since its a common failer. I had one tv with a bad sdr board flash 3 time and another set it was flashing 4 times.
Posted on Feb 22, 2011
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