Question about Samsung PN42B450 Plasma TV
TV, turns on and off by itself, won't turn on with samsung remote control, or with direct tv remote, or by pressing on Power switch on TV itself. Won't turn on at all,
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Posted on Jan 02, 2017
SOURCE: 42 inch plasma wont turn on
I may have the fix.... Fixed two of my 50 inch plasmas that stopped turning on 1 year after I bought them. They both wouldn't turn on.... LOL Just gave me the black screen of death and a red blinking LED when I tried to turn on. I have pics and step by step instructions. Your time and under 40 bucks is what you'll need. I fixed both my sets for 80 cents. You can fix yours too.... I too got the it would be better to replace it than to have it fixed lie told to me too. I held out to the bitter end. Glad I did....
Posted on Feb 08, 2009
I have over 10 years experience in electronic tech support.
I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.
If the TV is no longer in warranty, it will likely cost a minimum of $150 parts and labor. This is assuming that you only need a power supply module. If the problem is more than one of the circuit boards, the price of repair could go much higher.
I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.
Please let me know if I can be of further assistance.
Posted on Jun 18, 2009
I just fixed this very same problem. It is the capacitors are the problem. However, I think that if you have some minimal skills with soldering, you can fix this yourself. You just need to take out the system board, then the power supply parts are on the top right. The bad capacitor(s) will be bulging at the top and possibly have some brown stuff coming out. The ones that go bad are 1000microfarad, 10V, however you can replace them with higher voltage. I got 35V caps from radio shack for 1.59 each. You just need to solder out the bad ones and then put the new ones in and solder. Remember that the negative end goes on the side with the bold black part of the circle on the system board. Then just cut off the extra ends of the capacitors. If you are capable of doing this yourself, you will spend at most 6 dollars instead of however much a technician costs.
Posted on Sep 25, 2009
SOURCE: Samsung 42" Plasma HPT4254
i have the same exact tv with the same problem... it was a bad connection on a transistor... look at the connections closely
Posted on Oct 05, 2009
My Samsung 52" plasma TV will shut off while watching TV. It will do it repeatedly and we have to turn it back on. Is it overheating and shuts down? How can this be fixed?
Posted on Dec 19, 2009
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