Question about Hitachi 50DX20B 50" Rear Projection Television

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Hitachi 50dx10b I have a hitachi 50dx10b that wont turn on ... When you push the power button the led light comes on but no pic or sound i puled the back off and checked the main fuse and it is good and the main boards leds are coming on do you have any idea what could be .

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Water spilled on plug to tv,and it shut down. Plugged it back up, will power up,but no sound, or picture

Posted on Feb 02, 2010

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Try unplugging and plugging back up the power cord to reset it.

Posted on Aug 16, 2009

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Hello repko,

This looks like a problem related to your High Voltage Protection circuit. This circuit shuts the TV down when it senses a high current condition (a short in a vital circuit). It may not involve extensive repairs, but it will involve some repair work. I can give you a better diagnosis if you do a few things for me.

1) unplug the TV and take the lower rear panel off
2) look at the back of the panel or in the TV for a chart showing you the diagnostic LEDs
3) Look at see if LED D912 is red or not (this may differ in your model, if so write down the numbers of all the diagnostic LEDs and there condition on or off red or green.
4)post these in a reply to this topic.

Once this is done I'll be able to give you some idea of how extensive this may be.

Thank you,

I hope this helps,

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1 Answer

No picture or sound


Remove the rear panel. With the TV on you should see a red LED near the center of the PCB. There should also be 5 green leds, 3 to the left a 2 behind. If there is no red leds, check the fuses. If there are no green leds or maybe 1 or 2, disconect PSD5. It's a connector on the left side of the power board that connects to the audio board. It's the 3rd on fro the back. It's labled. With that disconected, turn on the set and look for the green leds. If all 5 light, the power supply is OK and you have a problem beyond that. If they don't all light you have a bad power supply.

Jul 21, 2008 | Hitachi 50EX20B 50" Rear Projection...

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Hitachi rear projection tv turned off, won't come back on


Hitachis have a series o led's on the main board, mabe up to six, thesshould all light up when the set is on, o frst thing is to lookat thes LED's and see if they all light up

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1 Answer

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Good day, papamotts;

Hitachi has LED’s, green ‘lights’ and a red light to determine what circuit may be the problem; after removing the back of TV, bottom only, plug TV back in and observe which LED’s come on …..BUT most important which LED’s don’t come on; locate and note number, EG; DP37 and etc.

Good luck, big IRISH. Ps let me know.

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2 Answers

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Good day, mochoaaanderpear;

Hitachi has LED’s, green ‘lights’ and a red light to determine what circuit may be the problem; after removing the back of TV, bottom only, plug TV back in and observe which LED’s come on …..BUT most important which LED’s don’t come on; locate and note number, EG; DP37 and etc.

Good luck, big IRISH. Ps let me know.

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1 Answer

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Below is a few possible causes along with verified cures.

Symptom:
Intermittent shut off
Cause: Check auto link and 4 event timer. redress cabling from front control panel away from blue crt-yoke-hv lead

Symptom: NO PIC OR OSD, PWR LITE COMES ON
Cause: CHECK C603 LEAKY

Symptom: shutdown
Cause: T701


Billy

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1 Answer

Hitachi 50DX10B Power issue


Rollo, broken solder connections either in low voltage or sweep section of the board, probably in the horizontal out put area but could be anywhere. If you want to attempt the fix the board has to come out and you`ll need a bright light as well as a good magnifying glass to find the broken joints and then re-solder them, Be certain your tv`s AC cord is removed from the wall outlet before doing any soldering, good luck, BMW Rider

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