Question about Hitachi 55HDT52 Plasma Television

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Hitachi 55HDT52 tv has no picture or sound. I have replaced power supply board, x sustain board, both didital boards, logic board, and incoming power filter board. Snot chips look good. I have green flashing LED in front of tv.

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6ya6ya
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Posted on Jan 02, 2017

  • 579 Answers

SOURCE: Hitachi 32LD8700 - TV won't turn on although has power

The general problem with LCD type TV's is that the power supply fails. They are very sophisticated designs that are difficult to troubleshoot and generally best to just replace the module, but sometimes there is visible damage in some of the electrolytic capacitors (visibly bulged) and high voltage rated parts can be substituted.
Hope Ya Fix It

Posted on Feb 10, 2008

Slinteriors
  • 8617 Answers

SOURCE: Hitachi

Without the correct meters and equipment it can get exspensive replacing boards however it almost has to be located on the power filter or the power board. I would suggest the power board over the power filter.

Posted on May 16, 2008

  • 927 Answers

SOURCE: DP23 LED not lit on deflection board no picture on tv

Good Day, Gil;
Your problem is in deflection circuit (115+v) check these: FP05, DP15, Q777, QH01, TH01, T701, etc. BUT suspect C707 1k pfd, 2kv, and check all the pico fuses (brown) 2" to the right of cap. Good Luck, big IRISH.

Posted on Sep 01, 2008

Ecollier2012
  • 3459 Answers

SOURCE: Hitachi 50ux58b


If you have Hitachi model number 50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B and you have the following symptoms you may want to grab a repair kit from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix these models. This is a fairly common problem with the above model numbers. It is typically caused by a blown capacitor and pico fuse. Again, you can get a kit from the above address. 
Here are the symptoms...

Primary Symptom: No Audio or Video. Power light will come on briefly then shut off.
Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

Hope this helps,

Posted on Nov 07, 2008

  • 2 Answers

SOURCE: chirping noise and flashing front power light.

I had the same problem with my 46" Hitachi TV. We left it unpluged for a couple of days (literature says at least 4 hours) Pluged it back in, held in on the AVX and power button at the same time, this puts it into self diagnostic mode. Error codes should appear on the TV screen, then it should instruct you to hit any key to continue. Press the AVX button and it should put your TV back to normal. I suggest however, that you download the specific manual off the internet for your TV. I got my manual from an electronic forum site (http://www.eserviceinfo.com). My TV model is Hitachi 46EX3B. Hope this helps.

Posted on Dec 05, 2008

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Vizio LC470DUG powers on for 4 seconds than goes off--possible mother board


No such thing as a mother board in a TV set. Here is a list of the PCBs
Types of TV Boards Every TV uses a collection of various boards to perform every function imaginable in a television. The boards work together to produce sound and images on a television screen. When certain mechanisms in a TV fail, it may be time to start testing different boards to see if they are functioning properly.

Main Board

The main board, or motherboard, is the central hub of a television circuit system. The easiest way to identify a main board is to find the board with the various video and audio inputs/outputs. Generally speaking, main boards also contain a tuner, HDMI, USB, and S-video port. Main boards are one of the largest boards in a television. This part is also sometimes called the main module or the A/V (audiovisual) board.

Power Supply Board

Another large and important board inside a television is the power supply board. Usually found in the center of the TV, the power supply board has several connectors that supply power to the other circuit boards. It can contain transformers, large capacitors, and integrated circuits. There is usually a table on the power supply board indicating the different voltages it produces in addition to the signal names.

Inverter Board

Found on LCD TVs, inverter boards are used to mount the LCD backlight. These are smaller boards, usually shaped like long, thin rods. If an LCD TV's screen is dark, distorted, or difficult to see, it can be the result of a defective inverter board. Inverter boards fail when inadequate power is not allowing current to pass through the backlight bulb.

Timing Control Board / Logic Board

The timing control board, known as the T-CON board, is typically only found on LCD and LED TVs. Plasma TVs, on the other hand, use a logic board. The functions of the logic and T-CON board are similar: each functions to digitize the information it receives from the TV's processor. This allows the screen to display images on the pixel level. When the T-CON or logic board fails, the screen images may become distorted, leading to pixilation and the appearance of lines on a television. On a logic board, there are slotted connectors on all four sides, while T-CON boards have connectors on just two sides.

X-Sustain and Y-Sustain Boards

Also known as the X-SUS and the Y-SUS, the x-sustain and Y-sustain boards only appear in plasma screen TVs. The X-sustain board may also be called the Z-SUS. These boards function similarly, producing proper screen images. Although they serve pretty much the same function, the two boards work independently of each other. The X-sustain board activates all the display lines at once, while the Y-sustain board addresses all the individual lines of display. When one board breaks down, it probably does not affect the functionality of the other. However, it may be a good idea to have both replaced because X-SUS and Y-SUS boards have a relatively short lifespan anyway. A failure of one could mean an impending failure of the other.

Buffer Boards

Buffer boards are also only found in plasma screen TVs. Connected to the Y-sustain board, a buffer board works to turn output to the plasma display. Common defects of buffer boards include the burning and shorting of power lines.

Dec 03, 2016 | Vizio Televison & Video

1 Answer

No picture no sound , 55HDT52 TV . we where watching it and it just went out ?


The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Sep 25, 2016 | Hitachi 55HDT52 Plasma Television

1 Answer

Tv repair.for plasma tv


No screen boards found. Do you mean any of these?
Types of TV Boards Every TV uses a collection of various boards to perform every function imaginable in a television. The boards work together to produce sound and images on a television screen. When certain mechanisms in a TV fail, it might be time to start testing different boards to see if they are functioning properly.

Main Board

The main board is the central hub of a television circuit system. The easiest way to identify a main board is to find the board with the various video and audio inputs/outputs. Generally speaking, main boards also contain a tuner, HDMI, USB, and S-video port. Main boards are one of the largest boards in a television. Main boards might also be referred to as a motherboard, main module, or an A/V board.

Power Supply Board

Another large and important board inside a television is the power supply board.. Usually found in the center of the TV, the power supply board has several connectors that supply power to the other circuit boards. It can contain transformers, large capacitors, and integrated circuits. There is usually a table on the power supply board indicating the different voltages it produces in addition to the signal names.

Inverter Board

Found on LCD TVs, inverter boards are used to mount the LCD backlight. These are smaller boards, usually shaped like long thin rods. If an LCD TV's screen is dark, distorted, or difficult to see, it can be the result of a defective inverter board. Inverter boards fail when inadequate power is not allowing current to pass through the backlight bulb.

Timing Control Board / Logic Board

The timing control board, known as the T - CON board,, is typically only found on LCD and LED TVs. Plasma TVS, on the other hand, use a logic board.. The functions of the logic and T-CON board are similar, as each functions to digitize the information it receives from the TV's processor. This allows the screen to display images on the pixel level. When the T-CON or logic board fails, the screen images may become distorted, leading to pixelation and the appearance of lines on a television. On a logic board, there are slotted connectors on all four sides, while T-CON boards have connectors on just two sides.

X-Sustain and Y-Sustain Boards

Also known as the X-SUS and the Y-SUS, the x-sustain and y-sustain boards only appear in plasma screen TVs. The x - sustain board might also be called the Z-SUS. These boards function similarly, producing proper screen images. Although they serve pretty much the same function, the two boards work independently of each other. The x-sustain board activates all the display lines at once, while the y - sustain boardaddresses all the individual lines of display. When one board breaks down, it probably will not affect the functionality of the other. However, it might be a good idea to have both replaced because X-SUS and Y-SUS boards have a relatively short life span anyway. A failure of one could mean an impending failure of the other.

Buffer Boards

B uffer boards are also only found in plasma screen TVs. Connected to the y-sustain board, a buffer board works to turn output to the plasma display. Common defects of buffer boards include the burning and shorting of power lines.
TV Boards Buying Guide

Nov 28, 2015 | Hitachi P50H401 50 in. Plasma HDTV

1 Answer

Hitachi 55" plasma: No picture, no sound


Perhaps the seller forgot to mention the basic power supply problems and who knows what else

Jun 12, 2013 | Hitachi 55HDS69 55 in. Plasma Television

3 Answers

I have a panasonic TC-P42C1 blinks 10 times no picture no sound What is common to go on this model (which board)?


Check the tv power supply board.That the board where the tv power A/c plug into it.Check the tv power supply board carefully for dying components parts that are called capacitors parts.Bad or dying capacitors parts on the tv power supply board are alway causes this problems to the tv.Bad or dying capacitors parts are very easily to spots,all these capacitors parts are alway bulges up onto it tops.Never have plats round tops as they suppose too.U have all the tools and know basic electronic also can do basic soldering work,u should changes all these dying capacitors parts in the tv power supply board with no problems at all.If u check all over the tv power supply board and it have no dying and leaking capacitors parts to the tv power supply board all.Then the tv Y-Sustain main logic Tuner board it is the causes and the problems.The tv Y-Sustain main logic Tuner signal board that is the board that take in the tv imcomming tv broadcasting signal cable plug into it.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv power supply board and or the tv Y-Sustain main logic Tuner signal board for the replacement.

Nov 06, 2011 | Panasonic TCP42C1 Plasma TV

1 Answer

Blinks red 8 times


U have all the tools?U know and understanding basic electronic and also can do basic soldering work too?Yes?All tvs with LED power light indication blinking lights are 70-80% are problems relating to the tv power supply board.That the board where the tv power a/c cord plug into it.Tv must have be unplug and taken aparts and by checking the tv power supply board carefully by looking for leaking and dying components parts that are called capacitors parts.These dying and leaking capacitors parts are very easy to spots.These capacitors parts are alway bulges up on to it tops and will not have a normal plat tops like is suppose too.U should replaced all these dying capacitors parts with the same Micro Farad and it voltages up like 5 or 10 voltages higher than those old voltages that are was lables by those old capacitors parts was in the board,this tv will solved this tv problems.But these Plasma tvs are having a very common problems with it Y-Sustain main logic tuner board too that the board where it take in the tv incomming broadcasting signal wire plug into it must have to be replaced too,if the tv power supply board have no problems or was fixed but did not fixed the power light indication won't stop blinking.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board and or the Y-Sustain main logic tuner signal board for the replacement.

Nov 01, 2011 | Panasonic VIERA TH-42PX60U 42 in. Plasma...

1 Answer

Was watching tv picture went out just have sound


Hello,

Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

I hope this will help to solve the problem....

Sep 26, 2011 | Hitachi 55HDS69 55 in. Plasma Television

1 Answer

The TV screen goes blank and there is no sound...if we wait for awhile...the picture reappears.


you should bring your unit to a qualified service pesonnel, problem like this is not a DIY act unless your a professional serviceman.

here are the check points
power supply,
X or Y sustain board,
bad screen (PDP panel),
logic board,
buffer boards

these sections of your TV are replaceable board.
the least you can do is just replace first the bulging/deformed capacitors.
begin with the power supply section..
after replacing try to pwer on again

good luck!

Feb 08, 2011 | Sony KDF-E55A20 55 in. LCD Television

1 Answer

With no picture but only sound on my Akai PDP 4294


Try replacing the Y-sustain board. Might have to replace buffers attached to it too. Have you had it diagnosed? My picture went out and I replaced the power supply board. Worked for 2 weeks then acted up again. Got a different power supply board. Same thing 2 weeks later. Was told it now was a bad Y-sustain board. Replaced y-sustain board. Worked OK for about 2 hours then started having picture issues. Not the same issues before power supply or y-sustain problem. Was told that you might have to replace buffers attached to y-sustain when you replace y-sustain. Tired of dealing with it and only watch a couple hours a day, so I don't always have the problem unless I watch the TV for a long time. Will eventually replace buffers to see if that works. I would definitely find a place that gives free estimates or close to free to get a technician diagnosis. Then you can decide if you are able to do the work yourself.

Jun 06, 2009 | Akai PDP4294 42 in. EDTV-Ready Plasma...

1 Answer

No picture


i have a hitachi 42edt41a that had no power and i replaced the power supply board, now it has power and sound and no picture, was told it now needs a y sustain board also

Feb 04, 2008 | Hitachi P42H401 42 in. Plasma HDTV

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