Question about Samsung LN-T4042H 40 in. LCD HDTV
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Posted on Jan 02, 2017
Over time TVs can dry out and then stop working. Switch it on and pour some water in the pack. About 2 pints should do the trick. You'll be back watching 100 channels of diarrhoea in no time.
Posted on Jun 24, 2009
In this case, I believe it is the power supply board; more specifically the capacitors are failing. When you have the clicking problem and the long boot up times this has generally been the issue.
When you have video display problems such as shadows and lines that go away after warming up it is usually the LVDS cable and T CONN board going bad.
I had the shadow and line problem and replaced both the cable and board for $120 and that fixed my problem. Since I had the TV apart, I went ahead and replaced the capacitors so I wouldn't run into that later. You can find the parts numbers for the LNT4661F cable and board below. You can find links to you tube ( Part 1 & 2) to show how to replace the capacitors. Good luck.
Samsung A/S-T CON BOARD BN81-01312A
Samsung Lead Connector LVDS BN39-00883A
YouTube (Part 1) http://www.youtube.com/watch?v=Mm51C_RDIZE
YouTube (Part 2) http://www.youtube.com/watch?v=BNHHrgX_6cs
Posted on Dec 18, 2009
SOURCE: Tv powers on for about
How good are you with a soldering iron? This problem on this TV is usually the faulty connections on the SMPS. Most likely all the parts on the board are good but sometimes ICQ805 is also faulty(most likely it is just the solder connections). You can try heating one area of the board at a time with a hair dryer and see if it stays on for longer. Sometimes you have to heat then freeze to prove the malfunction. IMPORTANT: If you are not good with a soldering iron or don't have a steady hand, LET A PROFESSIONAL DO THE REPAIR. The SMPS is a very delicate circuit and can be easily damaged. If you do this repair incorrectly you will be forced to replace the whole board.
Posted on Nov 08, 2010
SOURCE: Using Remote- TV keeps
This is a classic "Hic-upping" switchmode power supply problem. The protection circuitry inside the SMPSU, has sensed a severe potential problem, and is attempting the shutting of the set, down to avoid a fire, explosion, or both.
This set had developed a problem, that is so severe that the set must be shut down, (This set should really be removed from the Power and not used),
What is happening is the internal "Fault" that is causing the Protection Circuitry , to detect the problem and attempt to shut down the set, keeps restarting the set, because as soon as it shuts down, the "Faulty" component(s) cool down?, and the "Fault" ostensibly "Clears" so the PSU starts up again, only for the component(s) to heat up, whatever, again and fail, so it shuts down, and if left unattended, this would continue on until the part eventually failed. As related this is called a "Hic-upping Power Supply". Any fault that involves the power supply is usually quite serious, and needs a professional, usually, unless one is familiar with servicing current day, televisions.
And in my professional recommendation, you should get a "Quote" for repair, from, an, Approved Service Center. Now, this point is very important for a good result, Always contact, their "Local" or a, "Head Office" Philips in your case. Ask them, for a referral to an authorised servicing center, where you ask for a "Quote". Now, when you get the information you want, then you can decide as to repair of replacement.
The reason we want an approved agent, is that way, all the engineers are trained on their own brand sets, they have seen almost all faults, and will get the job done quicker, and for less cost, and usually have parts on hand, also sometimes, there has been a service bulletin in issued and the repair may be subsided or even free. There are many, many, many reasons that display this symptom, one must work through the troubleshooting steps to isolate and identify, the Cause and repair that and any damage done.
Posted on Nov 13, 2010
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