Question about Hitachi 53UDX10B 53" Rear Projection Television

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Power light does not turn off

The power indicator on our 53UDX10B does not turn off when turning off the TV. The picture is no longer displayed, though. There used to be a distinctive noise (not exactly a click, but something similar) when the TV was powered on, but that doesn't happen anymore. I tried unplugging the TV for a minute or so. Immediately on plugging it in, the power indicator was on, but no picture. The TV appears to be working correctly, but having the power light on worries me that this might be the start of some worse problem. Any ideas?

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Re: Power light does not turn off

This happened to me once and it was still under warranty. The warranty people came in and replaced a relay which seemed to fix the problem. Like yours mine seemed to work just fine when watching TV but I was worried that the power on all the time was putting undue wear on the components so that made me uneasy. Sorry I can't give you any more specifics.

Posted on Dec 30, 2006

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Cliks but wont turn on

you can check base on the light indicators of your television at the front of your screen. red light means standy by power mode and green is power on mode. once light is green its working but the lamp does not working. change the lamp.

Feb 04, 2011 | Hitachi 53UDX10B 53" Rear Projection...

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The red power light won't go off when i turn off the tv.

The model indicated (53UDX10B) has two mechanical relays---one is stuck in the on position---

If you follow the power cord inside the set to the power supply board you will find two that look like the ones in the attached photo---you can as a temporary solution unplug the set and tap on each of them with the handle of a screwdriver.

That should clear the problem but at some point it would be a good idea to replace both of them--about 4 dollars each from Hitachi.

Understand--when the power light is on the set is powered up and running--just the sound and video are not on---not a good thing as the set can over heat and develop real problems--not to mention being a fire hazard.

I am also including the part number and location numbers for you for this model.

SD Tech


Hitachi FJ00142 S901,S902 RELAY, POWER/AUDIO

Feb 04, 2010 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

MY problem with Sony KP-53S35 53 in. Rear Projection Television. When the TV powers on, the red light blinks until the picture comes on, then the red light blinks go off. I had to wait more than 5 minutes...

the number of flashes of the red indicator lamp points to the possible cause of the delay of the raster or picture, but usually it's an indicator of an emission unbalance between crt(picture tube) guns. the picture will take longer to show up as the emission on either of the picture tubes goes down.

Jul 27, 2009 | Sony KP-53S35 53" Rear Projection...

1 Answer

Red Power Light Stays on

Hi, you have a leaky diode, it will not hurt your tv it`s just annoying, my Hitachi has done the same thing for a year and I`m just too lazy to change it out, video-tek

Feb 02, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Power light flashes on Hitachi TV model #53UWX10BA


Can u tell me model no and company name so that i can help u clearly..

If u have warranty then u can claim it..

thank you

Oct 12, 2008 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Need Help big screen turns on thens goes off

a tv has two components, firstly a power supply produces high voltage to trigger a line transformer, in turn a transformer produces smaller voltages. firstly check if the ht is constantly been produced from a supply, if this is there than go to a line transformer, and check voltages at the output.

Sep 10, 2008 | Panasonic PT-61HX40 61" Rear Projection...

1 Answer

Projection TV turns off for a few seconds

Good Day, boattech1;
To my understanding the Model 53UDX10B is a rear projection, that uses no fans. I think maybe your LAMP may be getting weak.
Good Luck, big IRISH.

Jul 20, 2008 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Power up Problem

I think this is your problem
The convergence board needed to be "rebuilt" (lots of cracked solder) The ICs were shot as were several resistors.
this is how to fix it.

Dec 11, 2007 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Power light doesn't shut off.

You're right. It's not only a led problem. Efective. the tv doesn't shutt off due to defective relay S901 in primary power supply. It's a 5 volts ordinary relay, replace it and it'll be fine.

Oct 19, 2007 | Hitachi 53UDX10B 53" Rear Projection...

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