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Yes,the tv have a colors wheel and it is the cause of these problems.Humming noises,motor noises,picture flashes black&white or colors pictures within the pictures.The colors wheel,is dying or already dead.Hire a tv tech. replaced the colors wheel,will solved ur tv problems.
Yes,the problem is the colors wheel it dead.That one of the cause by the colors wheel,other are alots of squiling noises and making very loud buzzing sound.The cooling fan that u think is overheating,does it stop sometimes,when the tv is still on?Yes,than replaced it also,no than it still ok.Just hire the tv repairman,the parts he'll take care of it,don't order the parts,u might get the wrong parts or different sizes,that will not fit in ur tv.
This set uses a color wheel, part number is:
BP96-00674AYou can remove the lamp and look where it faces--it is a round plastic wheel with segments that are different colors---if you remove the lamp and look in the direction it faces(you may need a small mirror to look) if it is shattered or missing segments of the round wheel---it is your problem.
If it is shattered or damaged you are lucky--Samsung sells this part separate---it is located in the optical light engine--you can find instructions for replacing it on the internet--if you decide to do this let me know--I know a few tricks to a good replacement of this kind of part. From Samsung it is about 125 dollar part---You can search on Ebay with your model number(or the part number) and find it for much less---search the part number I gave you there and you will find it. This wheel turns at 14,000 rpm and they eventually lock up and or shatter. The set will detect no motion or improper motion of the wheel and may shut the set off.
I do this here for free, so if this helps you give me a vote here---IF you have any questions or need more help--contact me here.
You have probably have installed the wrong lamp or you installed a third party/off brand Lamp. If that is the case anything other than a Factory replacement Lamp will have a different color temprature. Install a Lamp that is listed from the manufacture.
It is unlikely that you can do anything yourself.
It sounds to me that there is a power supply problem that has steadily gotten worse and that cannot be confirmed remotely, it must be done on site by an equipped professional.