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Melvin Collins Posted on Jan 06, 2020
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The display on my Philips 55PFL5601 keeps flickering out. Issue with TCON or Main Board? Or LCD?

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Mikey

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  • Philips Master 6,903 Answers
  • Posted on May 07, 2020
 Mikey
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Probably T-con board.

5 Related Answers

Anonymous

  • 58 Answers
  • Posted on Apr 02, 2008

SOURCE: LNS4692D - TCON Board (seems there is a systemic issue)

You have to be very careful with the flat ribbon cables and be sure not to have an electro static discharge to the board while handling it but it is not that difficult of a repair. It is the board that is located at the top center of the back of the lcd panel. Depending on your problem, eg. line in picture, no picture with backlight.... it unfortunately only fixes about half of the units. The other half need lcd panels which are very expensive. hope this helps.

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Anonymous

  • 1 Answer
  • Posted on Nov 19, 2008

SOURCE: sound no picture, which component is tcon board? where all audio/video/cable/hdmi plug in to?

I have LNS4692D. Returned from vacation, turned tv on - no picture. Tried turning tv off for 4 hours- nothing. Symptoms are: tv is on - no picture , just sound; menu doesn't show, volume bar doesn't show;E.Saving is working - the backlight is changing from lighter to darker.
Found this website and ordered T-con, otherwise known as the LCD panel driver board, p/n# Bn8101286a ( thanks premtech) from partstore.com for $124. Part number BN81-01286A A/S T-CON Board.
Installation:
1.Remove plastic cover. There is an arrow for each screw that needs to be removed. Make sure to unscrew pins next to VGA port. I've spent some time trying to figure out what else is holding the plastic panel until I found this pins.
2. Remove big metal shield in the middle of tv that is covering main components. This shield is being held by small black screws all around it.
At this point you will see cover of T-CON. Here is the picture
http://www.avsforum.com/avs-vb/attachment.php?attachmentid=118863&d=1220531321 (thanks ldac9). Do not attempt to remove that cover yet. Proceed with a next step

3.Remove metal panel that holds main components. Locate big chrome screws that have arrows pointing to them and unscrew them. Remove 2 more screws on the bottom of the panel that holds it together with a box for cables. At this point the main panel will be lose
4. Carefully start lifting the panel. You will see that there are connectors going from components on the panel to components on the lower panel and T-CON. Carefully unplug these components and raise the main panel.
5. Remove 4 screws that holds T-CON cover. Pull the cover so that T-CON is completely exposed. The cover is connected by thin alluminum , don't hesitate to pull it , but don't rip it out.
6. Once T-CON is exposed you will see 2 red ribbons. I've spent some time to figure out how unplug those from old T-CON board. Here is the suggestion. Don't try to pull it out. All you need to do is to lift small plastic lever that is part of a connector. Then ribbon can be slided out. If not sure what to do, see how this is done on the new T-CON. It has a principle of buckle on airplain safety belts.
7. Remove old T-CON and install new you.
8. Follow reverse order.

I've never fixed TV before , but this was totally successful project.

Anonymous

  • 335 Answers
  • Posted on Feb 11, 2009

SOURCE: LCD tv main/digital board

Send it to us and we will refurbish the board.....

e-mail [email protected]


Abcd

  • 70 Answers
  • Posted on Jul 07, 2009

SOURCE: Philips Magnavox 37" LCD Flat

Disconnect the LVDS Cable that runs from the small signal board to the display panel and apply power,if the screen comes on,the Small signal board (aka Scaler Bd ) is the faulty board. other than that,all that's really left that has gone bad for me is the logic board.

Anonymous

  • 1 Answer
  • Posted on Jun 06, 2010

SOURCE: philips 17 inch 170s4fg lcd monitor,display flickering

I have Got one philips 170S lcd monitor. Iam having flicker peoblem and my display not stable. pls, give me ur best solution for the above problems.

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1answer

Have a Philips 55PFL5601/F7 TV that is flickering. Does this look like a tcon board issue or is it the main board? Or is it the LCD panel hoping it's not. youtu.be/ho5CbxNxG3U

The TCON board or the LCD panel is faulty. Can confirm by replacing the TCON board .
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/The TCON board or the LCD panel is faulty. Can confirm by replacing the TCON board .
If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/
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Samsung LN46D630 screen flickers

The Tcon board or the LCD pnle is faulty ,can confirm by replacing the Tcon board. If you wish to get some more information about Tcon board problems and solutions then check the following link.
http://electro-medical.blogspot.com/
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LG TV Flickering horizontal lines

The TCON board or the LCD panel is faulty. Can confirm By replacing the TCON board
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
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When turned on picture fluctuates and emits hig

The high pitched noise is coming from the Tcon board. It is not properly decoding the signal coming form the main board correctly. The only way to fix it is to replace the Tcon board. You might have a hard time coming across the part because Olevia has since gone out of business. Also, usually Tcon boards are not available sepertaly and most manufactures make you purchase the whole LCD panel of which the Tcon is included.
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LG 42LG5 TURN ON TV PICTURE GOES BLACK

This could be 1 of a few things here. Without opening up your set and trying to look at voltages or indiciator lights I couldn't tell you exactly without some more info.

Without looking at it myself here are my thoughts and where I would first look at.

It may be a main board because:
1) Main board processes all your audio/video signals. Bad main board means bad video processing. Could do that. Especially if the main board is not sending the right signal or a bad signal to the rest of the boards so they don't do their jobs. 

It may be a power supply because:
1) Power supply is well, the power supply. If it's sending inadaquete voltage to the main board you may not be recieving enough juice to keep that main board doing your video processing or further up the line keeping enough juice flowing to your TCon board to keep it telling things where to go and what to do. The power supply sends voltages to your Ballast board(controls your lights) and to your main board through which power is supplied to your TCon board via a LVDS line and a +12/+16V signals. If the power supply isn't pumping out enough juice to keep the TCon or Main Board running, it could be a problem. By the same token it could be that your P/S isn't sending power out to your ballast board. 

It could be a TCon because:
1) If the TCon is bad, you won't get your pictures. This could be the TCon board itself or the LVDS cable from your TCon to your Main. However, with few exceptions, if it's a bad TCon you're looking at a total panel replacement. 

It could be a ballast board because:
1) The Ballast Board controls the lighting behind the LCD screen. If this isn't working right you won't be seeing much of anything without that back lighting. If this is bad, it's a panel replacement. These are not field replaceable items by LG. 

Based on the symptoms, without more data or a eyes-on view of it, I would say you're most likely looking at a Main Brd or PSU problem. 
2helpful
1answer

Philips 17 inch 170s4fg lcd monitor,display flickering

I have Got one philips 170S lcd monitor. Iam having flicker peoblem and my display not stable. pls, give me ur best solution for the above problems.

0helpful
1answer

Flickering contrast

Could be a bad tcon or main board, below is the link for the manual if that helps
Philips 42 50 63PF9631D 37 Manual
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