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We have a Hitachi model # 50V720 TV. When you turn it on, green power light flashes, then temp and lamp lights begin to flash, eventually goes to just the lamp. Can you guide us as to what the problem may be?

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Y sus (sustain) board or main power board has dry capacitors or dead transistors or even main chip is dead, but to know more accurately you need to count the red light flashes. Google "red blinking codes" should find the answer, ebay sells Y sus boards or power boards around $125 (cheapest) for plasma TVs.

Posted on Jul 21, 2009

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1 Answer

Hitachi model number 50V720 does not show picture or sound when turned on. The Temp light and the lamp light flash red on and off. What's the problem?


Check the tv fan it is running?No than the fan require replacing.Yes,than the tv projection lamp life are ending require replacing.

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Just replaced a burned out lamp but the tv still wont turn on and the lamp light is still flashing? tv model #50V720


The tv have clicking sound alot too?Yes,the tv the board that call the Ballast board is dead too.The ballast board only job is to ignite the projection lamp.

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TV went off, and three lights come on (green "power", red "temp", and red "lamp")for just a second, in succession from left to right.


My television had two red lights flashing, one for Temp and the other for the lamp. I removed mythe lamp assembly and the bulb filament was burnt out. I order a new lamp and housing unit UX21517 and replaced it and now I have the red light flashing which is calling out the lamp again.

Oct 10, 2009 | Hitachi 50V720 Television

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You may have a fan that is not spinning fast enought and a overheat condition is occuring or you may have a bad lamp.

Apr 06, 2009 | Hitachi 50V720 Television

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Replaced lamp on Hitachi 50V720, still have flashing red light


Just make sure the Box (Lamp Enclosure) is pushed in firmly on both sides, left and right. Left side to hit the power connection and Right side to hit the little relay switch, Must be flush against that back side. It happened to me and I was kicking myself in the ***, a entire weekend went by with a brand new lamp sitting in the enclosure but not completely set in correctly with a flashing red light.

Feb 21, 2009 | Hitachi 50V720 Television

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Hitachi Model #50V720 50 '


ther is only one lamp bulb to change.
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Jan 08, 2009 | Hitachi 50V500 50 in. HD-Ready LCD...

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Hitachi model # 50V720


I have the same model and had the same problem after replacing the lamp. Turns out if the cover plate is not put back on properly, tv will not power on and lamp ligth comes on. To solve the problem all I had to do is tighten the cover plate screw. Hope this helps.

Nov 17, 2007 | Hitachi 50V720 Television

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