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Topic: Hitachi 57F710E rear projection no longer turns on after power failure
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Joined: Aug 9, 2018
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I have a Hitachi 57F710E rear projection tv that won't turn on. We recently had a power failure, the electric went off and on, off and on, and then off and stayed off. This happened in quick succession. After the power was restored the tv wouldn't turn on. I took the back off of the tv and checked to see if there were any fuses that might have blown. There was 4 fuses, 3 on the power supply board and one on another larger board that I believe says "deflector" on it. All the fuses were fine. We did the unplug and plug in thing like the book suggested and it didn't work, we even left it unplugged for 72 hours and plugged it back in, it didn't work. So, we decided to just move it out to the garage to get it out of the way. After we moved it out there I decided I would take the back off and take one more look at it. after I took the back off I plugged it in and I heard a slight click, it only clicked once. I also noticed that there was a small green LED light on the deflector board that was lit up, so I pushed the power button on the front of the tv and I heard the tv come on. I went ahead and hooked a dvd player up and lo and behold the tv was working fine. At that point I decided to go ahead and clean all of the optics. I then brought it back into the house and hooked all the STB's back up and plugged it in. The tv wouldn't turn on. It no longer makes that small click noise when I plug it in and the little LED light on the deflector board no longer lights up.

Could someone give me an idea of what could be wrong.

Thanks
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Joined: Mar 28, 2005
Posts: 12,075
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In my experience over the years, it is often a blown capacitor somewhere along the chain from main power input to the actual tubes. It's a very common issue in electronics and electrical devices in general. With a TV of this age, it may be fun to figure out on your own, but certainly not to pay someone else to fix.
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