Question about Hitachi Televison & Video
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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Posted on Jan 02, 2017
This could cause a problem, because modern TVs and most other entertainment electronic goods, have a small kind of computer chip, but there should be a Reset button probably inside the set! If you feel confident about computer chips you may be able to find the button by tracing the circuit.(Disconnected from the mains). Another idea is if there is a small button cell or battery inside, then try disconnecting it for a day. Good Luck!
Posted on Dec 02, 2006
on the signal board replace the caps by the 5/9 volt regulators. c2p04 is the main culprit. 6 caps in total can be changed. I believe c2p05 also.
Posted on Dec 15, 2007
SOURCE: Power problem
OMG!! I had the exact same problem! I unplugged the TV to paint and it stopped working with a flashing green button. I ran my fingers along the bottom of the screen and it actually worked.. wow THANKS A TON!!!
Posted on Jul 06, 2008
Should have been 3300 UF 10V caps that were bad? Shouls have been replaced with 3300UF 18V. 50V is huge. If it was replaced with a 50 the polarity may be wrong or the cap it too big to be seated property. Sometimes the caps just dry out and even a normal looking one will be the culprit of no OSD. Are you getting an LED fault code blinking? That should be a red led. Do you hear the relay clicking.? When you replaced the caps did you charge them? Just plugging in the set without trying to power it on for about 20-30 mins. I may be able to help you
Posted on May 08, 2009
This is a common problem on these plasma TV's. The problemresides in the high voltage boards known as the X and Y Sustainboards.. You can purchase them here for a very reasonable price:
The above link is to a Y-SUS board. The X-Sus board is often the 2nd cause of failure and can be found here:
Totest which board is failing, you need to check voltage input to theYSUS board first... Input should be 120V from Power supply, outputshould be above 250V.. Do this test with XSUS disconnected. IF 250+Vexists, then XSUS is damaged. If not, then the YSUS is the faulty part.
Posted on Oct 16, 2009
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