Question about Samsung LN40B630 40 in. LCD TV

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Tv wont turn on

Red light blinking, faint white flash on screen. Yesterday, tv wouldn't turn on right away, but kept trying and eventually came on.
today-nothing. manual says something about power management system-but not hooked up to a computer.

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  • Samsung Master
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Power supply board is dead.Replaced the power supply board will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Posted on Apr 25, 2010

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These 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 stage 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. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.

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1 dg board, (stv 5v sense time out). ........ive


To pettinabatem
I am having a shutdown problem with a Panasonic TC-32LX50. Initially when pressing the on switch, you see for 1 second a right half white screen (the left side of the screen remains black) and the TV turns off and the LED flashes 1 time. I did a T-Con cable check (based on the half white screen) and indeed this went away. Got backlight (full screen and no half white screen anymore). But still the TV shuts down after 1 second and the Red front LED flashes one time. Since this code is also illustrating a "dg board, (stv 5v sense time out)" problem in this unit, I was wondering if indeed you have encountered a defective DG board with yours. I am enclining towards a defective Power supply board.

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Hi,
If standby red light is blinking on tv front that means tv got some internal problem, since tv is new so would be under warranty, call Best Buy or number written on tv documents and ask warranty cover.
Any attempt to fix tv by yourself will void warranty.
Let me know if you have additional question.
Thanks.

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The flashing light red power light should only stay while the fan cool down for about 1 minute after a power off (remember to always wait before unplugging the TV so the lamp can cool down with the fan). Does that flashing start right away after plugging back the TV after an hour of letting it without AC power.

The red light should flash no longer than 10 sec. This prepare the light to be turned on. If all is OK the green should stay (no longer flashing) and the sound and picture come on.

As for the lamp flashing, i bet it's only 1 time each 5 sec? Or do it group many rapid flash each 5 sec?

Things that can be wrong:
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-the lamp is not proprely inserted (wait an hour before manipulating it to be sure it cooled down, and use glove to not put body oil on it).

-Lamps is defective and is not operating properly so you can't get to the usual on screen message that recommend to change the lamp.

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I also have this model. A few months ago, when I turned on the tv, it told me my lamp was in need of replacement. just yesterday, my tv did the same as you....the blue light flashed and then the lamp light kept flickering. All I can say is your lamp needs to be replaced.

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if the lamp light is flashing u need to replace the lamp. u should have instructions on the set or in the manual

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