Question about Hitachi 50SBX78B 50" Rear Projection Television

1 Answer

Proscan television I go to turn it on and it wont come on. The power button will flash 3 times and thats it. No sound or picture

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  • sextynine Oct 05, 2007

    the service# PS52690LX1 and the chasis# PTK188AB

  • mike38 Jan 05, 2008

    i have unpluged it and that all

  • mgray9654 Feb 23, 2008

    have the same exact problem, just happened today. push power button, it will flash 3 times then nothing.

  • hendrickx Oct 10, 2008

    Have the same problem, no picture, no sound. push power button, blinks 3 times then nothing.

    Lamp replaced by repair man, solves the problem for 1 day, then again nothing.

    Ventilator + lamp replaced by same repair man, solves the problem for 1 day, then again nothing.



  • Anonymous Oct 22, 2008

    turn the tv on it flashes a few times then will shut it self off. no picture or sound.

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Please provide service number--sounds like common transformer failure---

Posted on Oct 01, 2007

  • Vista Electronics Oct 05, 2007

    transformer part # is 227853.

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TV POWERS ON, THEN BACK OFF


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1 Answer

If i turn off my tv it wont turn back on


This problem is either the TV's software or how the mainboard is distributing power so instead of just unplugging the TV, try a power drain:
1. Unplug the product's power cable so the device is not grounded to the house. 2. Press and HOLD the product's own power button for 1 minute to drain the capacitors. 3. Plug the product back into a wall outlet and try to turn it on.
Note: This procedure works with battery operated devices as well so remove the batteries and hold down it's power/on-off button.  Electricity can remain in capacitors and on circuit boards enough to prevent normal functionality. By clearing the residue electricity, your product will have a fresh start and many times this will resolve a buggy or non-responsive device that appears to be dead.
Since hardware either works or it doesn't, your issue is either software or power related since you can get it to work so hopefully the power drain will indicate further.

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My proscan is buzzing and pix is flickering when the power is on.


I found this solution on another review, hope it works
Model Number: Proscan 26" LCD HDTV w/ Built-in DVD Player26LB30QD "pro: good price, TV picture is clear and DVD player is compatible well.
con: sound noise
There was hum when I first turned the TV on, then I followed these instructions (found it from other review) to fix the hum issue:
1. Turn tv on
2. Input mode should be tv
3. Turn volume to zero
4. With remote enter 9 8 7 6
5. A menu will appear on left side
6. Arrow down to backlight and with right arrow key move number from 81 to 83, press menu button twice,
7. Turn up volume and listen if hum is gone."
It works,no hum."

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This might help you

Proscan 19LA25Q 19" LCD HDTV at Crutchfield.com Proscan 19LA25Q 19' LCD HDTV: Detailed Info, Features and Specs, and Photos. ... Instruction Manual; Product Registration Card; Limited Warranty Card ...
www.crutchfield.com/ISEO-rgbtcspd/App/Product/Item/Main.aspx?i=68319LA25Q - 46k

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1 Answer

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A post in another thread said that you could test to see if the HV splitter is really the problem by disconnecting the HV anode (big red wire) from the flyback (not the splitter since that will arc), plug the TV in, power it up, and if the power stays on and you hear sound, replace the HV splitter to fix the problem.

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1 Answer

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