Question about Samsung LN-T4661F 46 in. LCD HDTV

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LN-T234H A samsung wont turn on dot stays red

Set will not turn on. The red dot stays red.

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: tv wont turn on

Mine was doing that then it quit even turning on too so I replaced the 4 Capacitors today on the power supply board that had bulged up on the top 3 had split open they where on the top right corner of the board where the ribbon jumps from the power board to the main board with ones from Jameco Part Number 606521 they worked perfect but make sure you put them in with the correct polarity easy to do just keep an eye on it. Very simple repair and took me about 30 min to take itapart solder on the new ones and put it back together all for under $10.

Posted on Jul 09, 2009

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SOURCE: my samsung l n-t4061f/ln 40 inch tv has rainbow

The problem was solve my power chip or piece burnout.So iam taking it to the shop to have it fix.Thanks for all your help

Posted on Nov 24, 2009

Testimonial: "thanks that's the problem taking it to the shop"

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SOURCE: LN 4661F -won't turn on -clicks -red dot flash

The capacitors in the samsung 4661 are inferior, this happens to all the ones in this line.

If you are feeling handy and don't want to replace your circuit board, here's what you can do.
Remove the 30 screws on the back of the tv. and the plastic shell will lift off.
There are two boxes, a large almost square one to the left (thats the power board, with the bulging capacitors) and a slightly smaller one to the right. (thats the cpu and circuit board)
You only care about the power board for now.
MAKE SURE YOU TURN OFF YOUR TV FOR AT LEAST 12 HOURS SO YOU DON'T RISK SHOCKING YOURSELF.

Remove the 6 or 7 screws from the metal casing on the left.
To unplug the connectors, either press your fingers at the sides of the connectors and gently lift them off, or pinch them from the small tab in front, and lift them gently off.
Remove the metal casing.
Unscrew the 5 or 6 screws holding down the power board and lift off the power board and take it to any monitor repair shop and ask them to replace your capacitors on this board, with more powerful ones. (usually 16v instead of the low 10v that come with it)
Just tell them its the samsung LNT-4661F and they will know the problem as most people who own this TV have called them.
Or they can google samsung 4661 capacitor kit, to see what capacitors they want to install.

Hope that helps someone, as I had to do it.
But it saved for $400.

ridley.69.hwb@gmail.com

Posted on Oct 25, 2010

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1 Answer

My Samsung 42" LCD used to turn on quickly, now it takes a LONG time for the screen to show anything. It looks like it turns on, turns off, turns on, etc. 7-8 times before finally staying on--almost like...


Ageing capacitors usually causes this sort of problem. They change value going low capacity etc. A replacement flourecent display board may likely fix it as the display is taking too long to come on.

Oct 16, 2010 | Samsung LN-T4081F Television

1 Answer

Dots in picture (red, pink, etc.). Will generally


COUPLE THINGS: MAIN MODULE OR DISPLAY INTERFACE BOARD. YOU HAVE TO DETERMINE: IS THAT HEAT RELATED ISSUE.MEANS, WHEN IT ACTS UP, WAS SET JUST TURNED ON OR WORKED FOR A WHILE? ALSO, TRY NOT TO PLAY WITH POWER BUTTON. MUST POKE SET OPEN, FIRST AND RUN TV WITHOUT BACK OPEN.IF IT, STILL DOES IT, MIGHT NEED TO DO SOME EXPERIMENTATION: USE HAIR DRYER AND HEAT UP MAIN BOARD, WITH TUNER AND OTHER THINGS ON IT. SEE, IF THAT WILL CHANGE THE BEHAVIOR. ALSO, DON'T FORGET TO LOOK AT THE POWER SUPPLY BOARD, FOR BLOTATED CAPACITORS. SEE THE ONE(S), IMMEDIATELY REPLACE! NEXT, DO THE SAME TO DISPLAY CONTROLLER.LOCATED RIGHT ON DISPLAY, BURIED INSIDE OF METAL SHIELD.
LET ME KNOW, HOW IT GOES.
GOOD LUCK,
ALEX'S TV SERVICE,
PA.

Jan 25, 2010 | Samsung LN-T4061F 40 in. LCD HDTV

2 Answers

Samsung 46" pink dots


I had a problem with the TV going on and off several times before "warming up" and then having pink dots. I would have to reboot to get rid of the dots. I called 1-800-SAMSUNG and reported that I had problems with the capacitors. That is what was causing the problems - cheap capacitors and Samsung is aware that this has caused many TV's to malfunction. My set was not under warranty but Samsung sent a technician across two state lines to fix my TV. As long as the problem is the capacitors Samsung will cover this service call 100%. My TV is fine now. BTW - capacitors which are sold in Radio Shack are not expensive. Why Samsung chose to put the cheapest Korean capacitors in their expensive TVs is a mystery.
So if your TV need warming up and has pink dots on the screen - call 1-800 -SAMSUNG and tell them your capacitors are malfunctioning.

Nov 27, 2009 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Red Dots


This is know as diffusion. You will need to locate the Vs adjustment inside the TV and vary it up and down by NO MORE THAN 10 volts. If this does not correct the problem then you will need to replace the Plasma panel.

Aug 14, 2009 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Red dots across the screen


Please check the power supply board, if there is any Pup-Up electrolytic capacitors, please replace them.

May 25, 2017 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Pink and Red Dots


try removing and reseating the LVDS cable connected to the LCD panel

Jun 07, 2009 | Samsung LN-T4665F 46 in. LCD Television

1 Answer

Green Pixel or dots issue on Samsung LN-4051D


That's a flaw in the driver/timing circuits, but it could also be something simple like a ruptured ribbon cable or poor connection during manufacturing. Simple or not either way the driver/timing circuits need to be serviced by a professional technician.



Jan 25, 2009 | Samsung LN-S4051D 40 in. LCD Television

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