I have the same problem with my Hitachi rear projection tv. It just turned itself off last night when watching tv. I did the unplug the cord from the wall for 30 seconds and replug it in trick but it still didn't work. I called Hitachi and the guy I talked to just told me the same trick and that he wasn't a internal tech. or whatever. I even unscrewed the back if the set to see if there was a blown fuse of some sort, but the only fuse I found looked normal to me. Then when I plugged it back in a light came on in the back and then a few others came on and they all went off. Anyone have any solutions on this? I thought it might be somethign with the power supply, but I am guessing.
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Re: tv went off by itself
When you turn the tv on all the voltages come up for a second but the power supply is sensin a problem and it kills the high volatge and other voltages.One of the voltages the supply sends has a short.The tv needs to be service because components need to be checked and then replaced. Be safe and Seek the help of a technician to diagnose the problem.
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Symptom: All Front LED indicators are flashing in sequence: Power-->Temp-->Lamp-->Power......continuously Cause: Replace Lamp . This symptom may happen all the time or it may be intermittent. It is normal if it occurrs from time to time, See OG under TV Front Indicators explanation notes. Good Luck, big IRISH.
You need to replace the convergence ICs. If you can verify the model number of your set I will post the IC numbers you need and post a link where you can get replacement ics with instalation instructions so you can do the repar yourself and save about 400 dollars