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No video or on screen display,on plasma screen,just a very dark snowy screen. Green LED'S on the MAIN LOGIC CTRL BOARD LJ41-04461A flashing and Scan board clicking.

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  • t_p_c Jun 01, 2009

    The television is a Philips Plasma 42PFP5332D/37

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  • 822 Answers

Its a memory 24C04 or 24C08. check it out. thats why snowy screen.

Posted on May 29, 2009

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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

Replaced the power supply board on my plasma tv. Now have a snowy picture on all inputs. Green light on the logic board blinks evenly. No puffy caps. Is there another board that needs to be replaced?


After the power supply board replacement, Va & Vs voltage adjustment is a must and necessary for the proper working of the plasma display panel. Do it. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

Sep 20, 2016 | Samsung 43 PN43D450A2D Plasma TV

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

Samsung PN50C590G4F plasma TV turning on and then off with clicking sound after 6 seconds


Have you tried replacing the power cord or the voltage feed may be off replacing the whole cord should correct that

Jan 02, 2015 | Samsung PN50C590 TV

1 Answer

What causes no video?


Does the screen light up. May need to move TV to a dark room. If so? You may have a bad logic board, And if it does not? Then you have a bad Y-sustain board. Hard to tell part numbers,as RCA no longer makes TV's. Just the name is used. It may be Samsung or LG. The logic board is the small board near the middle of the TV. About 3x5 inches. The Y-sustain is the board near the left side looking at the back of the TV. It may have one or two long boards attached to it going vertical. This may not be the exact parts you may need,but will give you an idea of what they look like. sjlj9201708b.jpg Samsung LJ92-01708B Main Logic CTRL Board shopjimmy-bn96-13069a-top.jpg Samsung BN96-13069A Y-Main Board

Apr 27, 2014 | RCA " 42"" Class - Plasma - 720p - 600Hz -...

1 Answer

I have Lg 50pc3d-ud and it has very dark spots on the tv that moves around. The screen is also very dark no matter the settings. The dark spots aren't always there, they go away sometimes but if...


This problems ur tv are having only can be two causes 1) The Y-Sustance main tuner logic board or 2)The tv Plasma screen panel itself it is slowly leaking radiaton and dying,if it is the tv plasma screen panel itself it is dying than the tv not worth repairing because by replacing the plasma screen panel itself will cost the same as a new tv itself.The Y-Sustance board-that the tuner main logic board that take in the tv incomming broadcasting signal cable.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish Y-Sustance main tuner logic board for replacement.This tv problems are 50/50 between the Y-Sustance main tuner logic board or the very exspensive plasma screen panel itself.

Oct 27, 2011 | LG 50PC3D 50 in. Plasma Television

1 Answer

TV does not turn on/red led flashes 7 times in front


this is common issue with this model and through your troubleshooting is tied to y main board. blinking led on logic main in normal operation. when replacing y main always good idea to replace y upper and lowe buffer boards as they complete a circuit and sometimes replacing one without other could cause additional failure on remaining boards

Aug 10, 2008 | Philips 42PF7320 42 in. EDTV-Ready Plasma...

1 Answer

Plasma tv


Ok first i have to ask when u turn sound off on TV and get close to the TV does it make a buzzing noise ? If so u have a damaged Plasma panel .
If this is not the problem you could have a bad logic or y-main (most common problem) will need to perform a white screen test on the plasma panel to verify this is the problem.
This is what u need to do
1. Remove the back panel of the TV.
2. Remove the Small Signal Board bracket ( the two long bars on back of the plasma panel, the bracket that is connecting the two with SSB on it, remove this and disconnect the connectors to the power supply (CN1M02,CN1M03, CN1M45)except for the main power plug in you will still need this)
3. Once u remove the SSB bracket you should see a plasma panel resembling pic 1.
4. Place a jumper wire or connect the two pins (CN 2012) on the logic board located underneath the SSB bracket.
5. Also place jumpers on the power supply (J8003 and J8004)
6. Now plug in the power supply, U should hear the relays click and after 5-10 sec you should see a green led on power supply, and 2 green leds on logic board 1 will be solid and 1 will flash.
With this set up you should get a white screen on your TV this will let you know if the panel is bad or not.
Also forgot to ask have u had this TV worked on recently or this just happen for no reason.

May 07, 2008 | Televison & Video

6 Answers

Philips 42PF7320A/37 won't power up Led blinks 7 times


This what to do measure from the logic board which is located under the small signal board and have the AV jacks connected to it. If the voltage is 3.1 or close the problem is with the power supply or a boar connected to the power supply. Unplug the set. Disconnect the Y main board first that will be on the left side of the set facing the back. Plug the set back in if the led is solid replace the Y main and the Y upper lower. If still blinking plug the Y main back in and unplug the X main which is on the right side facing the back. If the led is green replace the X main. If the led is still blinking replace the power supply.
But if the volts are 0 the problem is the SSB or the logic board. In that case take the (SSB) small signal board out the set and place 1 jumper on J8003 and another jumper J8004 of the left side of the power supply. Then place 1 jumper on CN2072 of the lower left part of the logic board. Plug the set back in if the set displays a white, blue ect screen replace the SSB. If not and on the logic board you don't have 1 solid blue led and 1 blinking led data is not flowing and change the logic board.

Dec 13, 2007 | Philips 42PF7320 42 in. EDTV-Ready Plasma...

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