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My Sansung HL-S4266W just shut off one evening while watching. It had all 3 lights blinking and it had been over 3 years since buying the tv. I replaced the bulb, nothing changed the tv would still turn on but shut off after a few minutes. I next changed the color wheel, still the same problem. So last night I replaced the ballast, still the same problem. All dust on fans etc. have been sucked out and made sure that the back switch is pushed down by the back door lever. The picture has been good all along, the brightness and color is the same. The only problem is the tv will shut off after 30 minutes or less. It does not turn back on right away, it will make the noise at samsung startup noise but no picture or sound, it will try tyhis a few times and shut down to the 3 blinking lights. I thought that it could be the lamp fan, so I put an external fan blowing strong air into back vents but it made no difference. What could be causing this problem?

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This could be the color engine or a power supply problem. My suggestion is to not put anymore money into this tv, its an old technology and you will be replacing parts for it every 3 or so years. eventially the parts will not be able to be found. Go get a new tv, save yourself money and headaches.

Posted on Aug 07, 2009

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1 Answer

Samsung tv keeps turning off


I had this problem. It cut off and front panel lights were blinking. Replaced bulb with a phillips OME bulb. Part # is on TV. Cost was about $100.

Aug 25, 2011 | Samsung HL-S4266W 42" HDTV

1 Answer

Tv turns on about 30 sec later screen goes black sound stays on for about 5-10 sec then just goes off then all 3 lights blink looks like a frowning face i have replaced my bulb about1 year ago is there any...


Bad lamp again. The lamp life is not dependent on install date but more the amount of use. Ebay for the lamps, a lot of the time you can get them 50% off for refurbs.

Jul 28, 2011 | Samsung HL-S4266W 42" HDTV

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Tv comes on for about 10-15 seconds then shuts off and all the lights in the front blink (lamp,temp,and standby)


You have a power supply circuit issue.
Possibly a component in the primary side of the power regulating circuit for power on is weak or defective.
You unit will require a tech to look at the power section of your TV.

Mar 19, 2010 | Samsung HL-S4266W 42" HDTV

1 Answer

Hl-s4266w Powers on for about 15 seconds then turns off. Was told it is a timer that needs to be turned off by using factory remote - I have lost the remote! now what?


Not sure about the timer. Our 55" samsung broke last week and it was shutting on/off no picture just turn on music recycling off/on. The blue light was lite on TV and red light to the right was blinking. The TV repair guy replace the Power Supply board b/c of swollen capacitors, was under warranty. The board runs about 70 bucks though. Took him all of 5 mins after unscrewing the back cover of TV. The board is at the bottom center after cover is removed. Hope this helps

Mar 18, 2010 | Samsung HL-S4266W 42" HDTV

1 Answer

Tv wont stay on


Have you checked the lamp? If the tyv is 3 years old and the lamp has never been replaced,it's time.The crackling noise also sounds like a blown lamp.

May 10, 2009 | Samsung HL-S4266W 42" HDTV

4 Answers

Problem with tv turning off by itself.


I had a friend with the same problem. He had to clean the components and fans in the set. The accumulated dust had caused the set to run hot and a safety switch was the tv off. He purchased a few cans of compressed air and, as he blew the components and fans out, used a vacuum to capture the blown dust. Good luck.

Dec 27, 2007 | Samsung HL-S4266W 42" HDTV

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