Possibly the capacitors in the power supply. You can identify the bad ones by their bulging tops. If you have the wherewithal, you can replace them for about $10.00 or less.
SOURCE: screen goes black but not off hps5033
the start relay in your power supply has burned points and, needs to be replaced; this requires finding the part and, then unsoldering the part and, soldering in the new part. If you feel capable of doing the repair let me know
SOURCE: samsung lns4095dx/xaa after 30min the screen goes
The first place to start is with the Main bd. The second cause would be the T-con bd. Have a trained Samsung tech troubleshoot to find out and repair the set.
SOURCE: Samsung ps42p4h1x screen flickers and then goes
When troubleshooting these units, there are always several variables to consider. First check to see what last occurred with the unit such as did the children play video games, did the electricity go out due to bad weather. You may see that there are many possibilities but let's focus on what occurred last to the unit. Once we determine what happened last, we may isolate the actual cause of the problem. The actual cause may be associated with projection issues, older versions (Picture tube), interference from devices located nearby, and even a radio turned on and located really close to your unit. This is normally known as electromagnetic interference to electronics and is very common with the error you have provided today. Please continue to look for anything EXTERNAL to the unit before looking at the internal components. I have been working on these a long time so feel free to follow up with me.
SOURCE: When turning on TV Samsung 52 , 3 years old it
It is really easy to fix yourself if you can use a soldering iron. There are kits available at http://www.karmtec.com and specifically for this TV here.
SOURCE: how do I fix this problem
This sounds like a very common issue.
If set is hard to turn on (takes several tries)but will eventually turn on hereis what my guess would be.
Every set has a standby power supplythat is running 7/24 if the set is plugged in and it supplies voltage to theremote circuit that turn on the main power supply for the tv and hence turn theset on.
This is an area where companies cut corners by using lower rated voltage caps.By this I mean Standby usually provides under 10 volts to trigger the seton----what they do is use filter caps rated at say 10 volts max in a circuitwith 9 volts (example)=with the standby on all the time the filter caps(electrolytic caps) dry out and fail.
The problem usually begins where you have to turn set on or or two times andgradually gets worse--takes longer and more tries to get it to come up.
Once on it will stay on until turned off for a period of time.
The caps will begin to work better (regain some of thecapacitance) as they get hot--hence one it is on it will seem ok.
The beauty of this problem is most of themhappen when set is a year or two old (no warranty) and all you have to do islook at the top to locate bad ones.
They are generally black or blue and round and vary in --they have twoconnections each--a + for positive and a - for negative--not unlike a batterywhich in a way they are. The + and - are marked on top and bottom of most boards.
They are easy to replace and not expensive parts.
The tops are silverand metal looking with creases on top and if bad they will be puffed up ontop---tops must be perfectly flat with no brown material leaking top or bottom.
If this is your problem once you id them (make a drawing) you can begin.
Here is the critical part---on each cap is also marked the value like 220uf 10vdc---220 micro farad at 10 volts maximum.
If you find for example 6 puffed up and all are 10 vdc replace them with thesame value capacitance (like the 220 uf) but go up to at least in this case(from 10 volts) to a 16 or higher rated voltage cap.
The only issue is when you go up in voltage rated value the cap is larger sosometimes there is an issue of physical space for the replacement on the boardto fit them in.
The reason they cheapen these sets in this way is if 10 caps and you make25,000 sets there is a considerable savings in parts cost.
They do not care as long as it lasts past the usual one year parts warranty.
I have taken the time to be long winded because this really sounds like it maybe the problem you have.
See attached photo of a typical bad puffed up caps and if you have questions or need advicelet me know.
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