Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
SOURCE: TV won't stay on. Green & Red light timer-lamp (Green) stand by/temp (red) flash.
Most likely needs a new lamp. Easily done yourself.
SOURCE: I own a Samsung HL-R5067W 50
The color wheel needs replacing. Thats causing the whining and it will also make the lamp light blink.
SOURCE: my samsung dlp hl-s5686w turns for a minute video
I'm having the same problem. Tried several things from dusting the inside with an air blower, removing the bulb and putting it back in, making sure the side panel is installed correctly and none of this has kept it from shutting off. Samsung's site says the three lights flashing means replace the bulb but I'm not buying it. My picture looks perfect....jsut that the TV keeps turning off. It all seems like a heating problem but my fans are still working. I'm scratching my head thinking what to try before forking out $150 for a new bulb.
SOURCE: I have a Samsung HL-S4266w TV When I plug in tv I
You need to replace the Color Wheel.
Encompass Parts Distribution 1-800-638-3328
Samsung Parts.com 1-800-844-7871
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