Question about Hitachi 57S715 57" Rear Projection HDTV

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Tv power will not come on tried un pluging and pluging in diffrent outlet still will not work

Posted by noah johnson on

  • noah johnson Jul 21, 2006

    would love any help

  • noah johnson Jul 24, 2006

    My tv will not power on. I do not see any red led lights on. The only light that I see on my tv is the blue power light and it is not coming on. I was watching tv on the 20th of July and decided to turn the tv off from my direct tv remote. When I went to cut it back on with both remotes, the tv would not respond. No lights or sound at all. I also checked the plug and chord.



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This looks like the solution to my problem. I just want to know how much these parts that we are talking about? And where is the best place to buy parts?

Posted on Jul 26, 2007



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You did not say if any lights are lighting up on the unit. If the red LED is lighted or blinking your power supply, and fuses, are probably OK. If the LED is blinking it means that you probably have a problem in the high voltage circuit. Usually the Horizontal Output Transistor is shorted. Could be caused by a power surge, lightning strike or shorted flyback. If you know TV safety, how to use a DMM, soldering techniques and are good with tools you might be able to fix this. Unplug and open the unit by removing the back. The HOT is near the flyback (a large round cylinder with a large red wire coming out of it) usually on the right side, mounted to a large piece of aluminum (used as a heat sink). Using a DMM check the HOT. If shorted this is your problem. Replace the HOT and the flyback. Check all resistors and diodes in the circuit for problems and replace any out of specification. This may solve your problem. If not the HV Block could be shorted also. This is part of the same circuit and is where the wire from the flyback goes. If after replacing all these parts the unit still is not working you will proabably need a repair tech to look at it. If you do not feel confident doing any of the repairs listed above seek the help of a reputable repair shop. This repair should not be very expensive in relation to the cost of the set. Good luck.

Posted on Jul 24, 2006

  • Anonymous Jul 24, 2006

    If you know that the unit is getting power and there is no response at all (nothing lights up) you could have something as simple as a blown fuse, a problem with the power supply or as I said before a shorted HOT transistor. Checking the fuses are straight forward. Remove the back, with the unit unplugged, using a DMM check the continuity of all fuses. There could be one or more in the power supply and one or more in the HV section. If you do not have troubleshooting skills you will need the help of a qualified repair tech as these problems can be very complicated (or very simple) but knowing where to specifically check is tough unless you are trained and familiar with troubleshooting. It's hard to give you a cost estimate with no idea of what could be wrong but I would think that no matter what it is it would be cheaper to repair the unit than replace it. Good luck.



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