Question about Samsung LA40A450 40 in. LCD TV

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I have an LDC TV model la40a650a1fxxy. I keeps losing turning off or losing the signal. The power light either turns off or flashes. This just happens randomly but is increasingly more frequent. It also happens anytime I try and use the remote control.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: my samsung tv wont turn on, red light keeps flashing on the front.

i had this with my samsung and my mums instead of pressing red power button press either switch from analog tv to digital button or just press a number

Posted on Sep 03, 2008

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  • 10 Answers

SOURCE: samsung 46" HDTV power keeps turning off after a period of time

Panal damage is a possibility however, you may also try to have a tech replace your mainboard since you have sound.

Posted on May 23, 2009

  • 188 Answers

SOURCE: power light keeps blinking and power will not turn

Check back light inverter,if ok then check the 12V and 5V line,if not OK probably the IC in the power supply is defect ( F9222 )

Posted on Jul 20, 2009

lightnbaby
  • 36 Answers

SOURCE: hi my samsung lcd tv model le40s8, it won't switch on

if you can do soldering work, replace two 1000uF10v bulging capacitor with 1000uF 16v or 25v in powersupply board. you will save $200.

Posted on Nov 12, 2009

tvtek
  • 1284 Answers

SOURCE: SSP-R4232 Plasma TV, blue light on, but tv wont turn on.

At this point it appears that your main board is probably bad. You most likely have a 5 volt scource going to the main board but its not powering up the set. The main board is part number BN94-00796A.
You might want to have a technician look at the TV to verify this as the issue before purchasing it. Please take a few moments to rate my answer. Thank you.

Posted on Nov 18, 2009

Testimonial: "I was extremely grateful to have a response in such a short amount of time, as soon as I replace the part that was suggested as bad to me, Ill post."

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The power light keeps flashing and the tv wont turn on - TV ...

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If you unplug for a minute and hit the power button it sound like it is coming on then it shuts off and the red power light flashes slowly. The TV is a Panisonic 1080i HDTV, about 6-7 years old. ... I have an old type sony tv with the big back and the red power light keeps flashing and ...

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Motorola DVR DCX3501-M loses power and guide info resets


We call it "flashing 8's" and a lot of things can cause it.

1st one of the signals that the cable provider sends to the box, we call it a "hit", will reset the box and tell it redownload
2nd I find dirty power (poor wiring, UPS or surge protector failing) can send the box spikes of power that make it think it recieved a hit.
3rd could be a problem with your cable signal. signal too high, yes it is possible to have too good a signal. maybe a bad amp in the alley behind your place or on your building. (any neighbors having trouble?)
4th maybe its a bad box.... gotta go bad sometime.

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Does the set just click on and then right back off? Do you have Flashing power Light on Front or is TV playing with Loud Clicking?

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You're either losing high voltage or power supply is not producing the horizontal drive signal, Check for 130v on the collector of the horizontal output transistor, if you're missing your voltage, you have a power supply problem. If voltage is too high you have something open in the power supply such as a low value resistor. If its low, something is shorted in power supply, possibly voltage regulator ic.

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The main tv Tuner signal board it is dead or it have problems,but tv still usable.Tries push the remote power switch off/on again everytimes OPC/Power LEDS lights flashes.Have to do this maybe 3 or 4 times for the tv to have a lite up LCD screen panel backlight to make the tv Tuner signal board to work again,for the tv to work.If still have same problems after 3 or 4 times power switch pushes off/on still have OPC/Power LEDS lights flashes.Mean the main tv Tuner signal board it is dead and can not be trying to save it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish tv Tuner signal board for the replacement.This solution 100% will work,if ur tv main Tuner signal board still have life left in it.I do this every few days out of a week for my 46" Sharp Aquo LCD tv set,tv it work all the times.

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1 Answer

The power light is blinking and the tv wont turn on


I have two 46" Sharp Aquos tvs,so i know this tv model well.Tv have Power and OPC LED lights flashes?Yes.Tries tv unplug,replug it back like about an hour later.The tv should be working again.This problems happen to Sharp tv alots,later on,should it happen again,just tries push the power switch on the remote again and wait the backlight will light up and tv will work again,some it will go back to Power and OPC LED lights flashes again,just push power switch again and wait,sometimes,u have to do this three or four tines to make the tv Tuner signal board to take to make the tv to work again.If u have to pushes power switches 10 or 11 times and wait and Power and OPC LED flashes lights again,it time to replace the tv Tuner signal board,that the board,where that take the tv incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish tv Tuner signal board for the replacement.

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I have a Sharp LCD 46 in.tv do this often.Yes,it is.This problems,the tv Tuner signal board have problem,but the tv is still useable.The POWER and OPC light indications flashes.Just push the power switch again,wait see tv turn,not POWER and OPC flashes again,push the power switch agian and wait.Have to do this like 3 or 4 times sometimes,than the tv backlight will come on,tv will work.Don't know but,if u require to pushing power button more 10 or 12 times,the tv Tuner signal board don't take an turn on the tv backlight get the tv to work.The Tuner signal board is dead,time to replaced the tv Tuner signal board.

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