Question about Hitachi 50SBX78B 50" Rear Projection Television

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Hitachi 50SBX78B No picture (snow) no sound (static)

Red power light does not light. When set is plugged in, it powers up, with snow on the screen and a loud static sound. None of the front controls work. Do not have the remote or owner's manual.

Have replaced a resistor fuse and a capicitor.

Red safety light flashes. All green leds light.

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Re: Hitachi 50SBX78B No picture (snow) no sound (static) - Hitachi 50SBX78B 50" Rear Projection Television Projection...

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Posted on Dec 24, 2007

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Hitachi 70SBX74B, LEDs light then fade out. No sound or picture but set has power.

Some Hitachi models have a known issue that cause what you deswcribe. Check the site for your model number and see if they have a kit,

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I have the same problem as above. I have a Hitachi 50SBX78B and it was working great until some water from the plant on it got into the screen. Now the red light comes on for a split second, then goes...

Unless the main board is checked the damage to the board cannot be accessed. so open out the set and check on for any failure of fuse or fusbile resistors that could have opened out with the water shorting.
If water is still found use a dryer to warm off the moisture.
It area of the water spill must be checked for the possible damage

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When u turn the tv on,u hear alot of clicking?That mean the Ballast that help the projection bulb to work is dead.Change the Ballast,might as well change the bulb too.U don't know what is the condition of the projection bulb in.

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Same problem. Replaced both convergence ICs about 5 months ago. Worked fince since then and just recently no sound, no video, blinking red on front panel and clicking sound. I suspect that the ICs went bad again and blew a resistor or two. I used cheap Chinese ICs instead of the Sanyo ones and thing this is why. I'll be looking at it again and post solution.

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You can get the parts from They have put together a kit that includes the parts and instructions to fix the following models (50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B). 

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Do you have a DLP or Plasma set????? Give me the model #.

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The green led or lights on the board indicate some of the power supplies are working. The key is do you see any come on and then go out. this would indicate which part of the power supply is failing. also there are fuses in the set that do not look like your standard glass fuse. WARNING television generate lethal voltages that will hurt you. extreme care should be used.

Jan 18, 2008 | Hitachi 50SBX78B 50" Rear Projection...

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Hitachi 50SBX78B 50" Rear Projection TV

If the power supply board is the only thing affected, I would suggest calling PTS:1-800-844-7871 and give them the model and what you are looking for. This would be the simpliest thing to do. They rebuild boards and maybe more cost affective than trying to repair yourself. Hope this helps!

Sep 07, 2007 | Hitachi 50SBX78B 50" Rear Projection...

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Wont power up

I have seen that symptom many times. Most likely, the little blue capacitor next to the horizontal output transistor has shorted and popped the main B+ fuse. This is very common in those Hitachi projection sets. These parts should be replaced by a tech familiar with Hitachi projection sets.

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