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Samsung 50inch LCD TV will not power up properly. The screen comes on for a second and then goes off

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You need to replace the lightbulb.

Posted on Aug 26, 2008

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Posted on Jan 02, 2017

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Sanyo DP46142 TV comes on for approximately 30 seconds and then screen goes black. Power LED stays on.


Sounds like a backlight problem to me. If you input a signal to the HDMI or Composite input and then it goes black have you tried taking a flashlight to the screen to see if the picture is still there but just dark? That would indicate a backlight issue. That model appears to be an LED edge lit backlight, so if the picture is still there after going black your going to have to trace out the backlight circuit and see whats going on. Usually with LED backlighting if it comes on at all then the LED's are good, its just the driver supply thats failing to keep them on. Some TV's have a small separate board that provides the backlight control, but i suspect with this model its on the power supply board and not the motherboard. Have you checked that board? It could be bad caps on the power supply board, check the voltages to the backlighting when it lights up and then when it goes dark. It could just be some failed capacitors on the power supply causing that voltage rail to drop off.

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1 Answer

JVC LT-42E910 LED flat screen TV, backlight comes on, menu box is displayed but after about 5 seconds backlight goes out. Picture and sound still working but no backlight. How can I troubleshoot?


jvc tv backlight Questions & Answers - Fixya

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Get free help, tips & support from top experts on jvc tv backlight related issues. ...JVC LT-40SX6AT flat screen. Was watching TV ... ...jvc logo, has sound but nopicture Backlight is defective. I suggest ... Question about LT-42E910 42" LCD TV.

EASY MOST COMMON TV REPAIR EVER!!! - YouTube

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Jan 6, 2012 - Uploaded by Tampatec
Must See TV FIX EASY COMMON Samsung TV Repair Repairing LNT LCD ... LNT KDL Sanyo ln FLATSCREEN TV REPAIR FLAT SCREEN FIX - Hear Clicking .... i have a JVC LT42E910 WITH a cracked screen. there are all these color .... Vizio LCD Powers on with backlight, Wont power off, No video ...

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Samsung 50" led un50h6350. The TV is about 18 months old and the picture went out, the audio and back light are working. I've replaced the t-con board and that didn't fix it. Someone please help!


Samsung LED TV Screed goes blank periodically for 1 sec - Forums ...

www.cnet.com > Forums > Samsung

CNETJun 11, 2015 - Lately, my Samsung LED TV's screen will black out from 1 -2 seconds then come back. The TV has been ... The TV is about 6 months old. .... I've only notice this when I'm watching in HD. ... by Stlouib / January 13, 2012 11:18 PM PST ...Mine does the same thing - picture goes black for 1 - 2 seconds and then comes back. Samsung Series 3 (330), won't show any picture/no sound?
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Are there still capacitor problems with Samsung TVs?


Dec 21, 2015 | Samsung Televison & Video

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Tv wont power on red light continuously flashes


Hi,you need to have the capacitors in the powersupply replaced

Oct 15, 2013 | Samsung UN46D6400 46 Inch 3D 1080p Smart...

1 Answer

My Samsung flat TV wont power on


Sound like a 24vdv circuit fault, inverter fault, or a bad back lamp.

Oct 20, 2012 | Samsung LE22A457 22 in. LCD TV

1 Answer

Samsung 27" lcd tv picture goes black, still have


0ne of 3 has failed:
(in order of probability):

1. Backlight inverter
2. Power Supply
3. Backlight

Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.

Thanks!(*&^%

Mar 19, 2011 | Samsung LN-S2738D 27 in. HDTV LCD...

4 Answers

Hisense tv turns on and off


STOP!

The unit has a fault on its power board and sustain board.
It turns off because the sensor is preventing some component from bacoming overheated and catching fire or damaging further components. Seel professional repair.

Please rate my help++++Thanks for using FIXYA

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My Samsung LCD TV slowly flahses colours, each about 2-4 seconds


hi,

your lcd is in test mode. you may try off the power. press and hold menu + source + power on.

this should go back to normal mode.

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