Question about Hitachi 50EX20B 50" Rear Projection Television

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Hitachi 50EX20B Bigscreen TV

10yrs of Flawless use until about 2-3 months ago...Problem started with TV set shutting itself off for 3 to 10 seconds,then coming back on (without any imput from us!!)...this occured Rarely (week/10 days) at first and gradually more frequently (and stayed "OFF" longer) until TV would no longer power up again (on its own),,without us repeatedly pushing on/off button....Unplugging and allowing TV to cool off(few hrs or overnight) seemed to help BEFORE, but now TV will not turn on at all!! Cleaned much dust "gently" (while Unplugged),fuse OK,....Red LED (power supply??)on main circuit board flashes momentarily (2-3secs)---then stays ON....BUT , 5 "other" green LED's @ various places on main circuit board Do Not Light Up (with power on)....Also,Red LED light (on the Channel/Volume selector) does not light up and shuts down when the TV shuts down...A320 Aircraft tech ,hoping I can troubleshoot/fix this...Best place to get a PDF service manual AND Expert advice Greatly Appreciated...Thanks

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Re: Hitachi 50EX20B Bigscreen TV

Excuse me, I'm no tech of any kind. Was that the solution to fixin the T-V? I'm having the same type of problem.Your answer is make sure the coolant is not leaking? How do I go about my problem

Posted on Apr 21, 2008

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Re: Hitachi 50EX20B Bigscreen TV

You can download a PDF from here: Make sure that the coolant is not leaking out onto the printed circuit boards. i have had the remote sensor cause this problem before and also I have had bad capacitors in the sweep and the main power supplies. Good Luck

Posted on Jun 14, 2007

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