Toshiba 55H70 55" Rear Projection Television Logo
Cyndy Davenport Posted on Jul 29, 2006
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TV is not powering up and red light keeps flashing

Hello, This television (Toshiba 55H70 55 in. Cinema Series) has worked great and pictue is fine when it will power up. Occasionally when we try to turn it on, there is no response other than a flashing red light sensor beside the actual power button. I have tried unplugging to reset and there are three different outcomes to this, they are listed below: 1. I will hear the sound of the tv kicking on and then red light will start flashing, this is without touching the power, only plugging it in. Pushing the power button in has no effect. 2. The light is off and remains off. I then push in the button to power on set and I will hear the sound of the tv kicking on but nothing happens, light starts flashing again. 3. I can turn it on and it starts up fine. (YEAH!) Is this a short in or perhaps a bad powersupply problem? How much will repairs generally cost? Could it be something else? Thank you, Cyndy Davenport

  • 9 more comments 
  • Anonymous Jun 19, 2008

    red light flashing and nothing showing up on the screen

  • rthillis Jun 26, 2008

    I have a 52 inch Threatreview, Toshiba Rear Projection TV and all of a sudden I cannot get it to turn on. Each time I point the remote toward the TV I cannot get that familiar clicking on sound instead i get red blinking light where the green power light used to be whenever i turned on the television. Now I keep getting this blinking red light. Even if I unplug the TV cord from the surge protector and plug it in another outlet, it it does the same thing, Can you explain or diagnose the problem with my TV IT is approximately 9 years or so old.

  • Anonymous Jul 05, 2008

    Red power light on front of tv blinks.

    Picture is escued. (Sound is OK)

    Most of the time problem is corrected by unplugging and plugging back in.

    Sometimes there is a loud knocking sound which lasts a few seconds.



    I have been told that the picture problem is cause by bulb in th back of the TV that is easily replaced.



    Your thoughts please.

  • gut3joyce Jul 14, 2008

    Mine is doing the same thing. I have it plugged into a power strip, turning off the strip is the only way i can turn it back on. It works for a little bit then turns off again, red light blinking, won't do anything with the remote or button on the front.

  • Anonymous Aug 21, 2008

    television will not turn on.No power at all.

  • Anonymous Sep 02, 2008

    my tv turns on at first the picture looks fine then it messes up and then my tv turns off and the power button starts blinking

  • djulian16 Sep 15, 2008

    occasionally the tv will not go on. power button fires up but then turns to flashing red. Once tv is on it will remain on until turned off. sometimes it

    will start back up, sometimes not??? Help!

  • doubleube504 Dec 30, 2008

    I have had mine for about 8 years and have had no problems and picture is still great. Every once in a while when we are watching tv, it will just turn off and the power light flashes red. The only way to get it working again is to unplug it and plug it back in, then it works fine. The power button does nothing at this point. Frustrating.

  • Anonymous Jan 18, 2009

    power light keeps flashing



    does not power on

  • Anonymous Jan 18, 2009

    power light keeps flashing



    does not power on

  • mags_86_05 Apr 12, 2009

    I am having the exact same problem. What did you do to fix the problem? What is the STR##### regulator IC in the power supply. We fixed the convergence chips and the resistors looked fine. Not brown like they are bad.

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  • Posted on Jul 14, 2008
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I had the same red blinking led problem on my Toshiba Theaterview tv. I resolved by:
- Unplugging the tv.
- Press several times (3 or 4 times) the tv Power button.
- Plug the tv back in and press the Power button once to turn the tv on....tv worked!!!

I've had the problem before and tried unplugging the tv for a couple of days and that had also worked, but I this recent solution seems to be faster.
Good luck!
Erick

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  • tm0703 Oct 30, 2010

    I followed the steps posted here and it worked for me as well.

  • Steve Shelton
    Steve Shelton Jul 08, 2014

    Worked! Thanks.

  • sandra
    sandra Nov 12, 2014

    This worked for me too! Thanks!

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  • Posted on Jul 29, 2006
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Cyndy, Yes this problem you have is most likly caused by the STR##### regulator IC in the power supply. You probably also have a capacitor or two that may need replacement and the best way to find those would be with an ESR type capacitor checker.. This is not a type of repair that a consumer with no TV experience should fool with. Please seek out a pro to assist you with this repair. Good Luck

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  • Posted on Mar 29, 2007
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I have the same problem on the same TV - nothing shown on screen, blinking red LED (sometimes slow, sometimes fast), clicking noise of a transformer. I got the TV free thinking I could fix it. It looks like the previous owner has replaced some resistors. Can anyone double check the pic and tell me if the mod is correct or not? PCB is marked PB9582 B Thanks

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  • Posted on Jan 15, 2007
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I have had this problem for about two years. The only time the flashing red light phenomenon occurs on my set is when someone (usually my father or my mother in law) turn the television power off and try to turn it back on again within a few minutes of shutting it off. Although I have not found a fix for this, you can avoid the problem by not turning the power on shortly after turning it off. I have never had a problem turning the power back on 15 minutes after I have turned it off, sometimes the time period is shorter, but if you don't wait long enough you run the risk of repeatedly turning the power on and off until the damn light stops blinking. It is aggravating but in seven years of owning this set I have had no other problems with it.

  • pete farenwald
    pete farenwald Oct 12, 2014

    I have the same TV and deal with this exactly the same way as you described

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  • Posted on Feb 02, 2007
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We just had the same problem, our TV was 6 years old. Repairman put a new IC in and it blew again (or shorted out) He told us that it would be easier to just replace the board, but that Toshiba board is no longer available. I hope we got correct information.

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  • Posted on Jun 15, 2008
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Replace the convergence IC. Had mine done by a professional for $200.00 and it has been working for a year now.

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Okay i have the same issue with my Toshiba big screen it just happened on saturday. And i called the toshiba factory and they say it is the power supply. so yeah you would need to get a new power supply for you television set.

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Have someone replace the stk ics and resolder the area around the ics tosh has a bulletin for resoldering this pcb altho the ics should be replaced due to age if you keep wathcing it it will eventually blow internal fuses then you will be the proud owner of a 55 inch piece of black particle board with a blinking red led on the front

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  • Posted on May 31, 2010
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I wish i would have saw this forum before i just bought one 57 inch and i love it for two weeks now i got a 500 dollar old particle board monster with a flashing red LED light.. lol it came bck on right away first time with a simple unplug, this time its dead i think.

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  • Posted on Jun 23, 2015
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Another solution is to check the fuses in the TV, 2 yrs ago our Toshiba 52" did the flashing red light thing, I simply opened the back, checked the fuses, changed out the bad one, and bam....no issues ever since :)

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I have had this problem for a while now and I've fixed it three times before each one getting a bit harder to fix I followed the instruction on here for the third one but now I'm having the same problem and this isn't working any ideas

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I have also had the same problem. Was told that it would cost about $500 to fix. Hard to beleive. Is there diagram or something that would helpin locating the IC's etc that need to be replaced?

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I'm having the same problem... My toshiba theaterview just died... with red blinking light..

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  • Posted on Nov 15, 2014
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Okay everybody - hold the phone. Here is how I managed to 'fix' this same problem on my Toshiba tube TV (2005 model) in November 2014. I turned the TV off using the regular on/off button on the TV, NOT using the remote. It evidently put the TV in "standby" mode (I.E. THE FLASHING RED LIGHT...). Here is how to fix it ---- unplug the TV, unplug the cable, take the TV and put it somewhere out of sight, so you will not be tempted to throw it away, and WAIT 24 HOURS. (Seriously, I'm not kidding...). Plug it back in, hook up the cable, and turn it on using the on set power button. Wa-laaa! It works, amazingly enough. Evidently this 'standby' mode times out at 24 hours. It worked for me. TRY THIS - what else have you got to lose, but your TV. And from now on, turn your set off using the REMOTE CONTROL, as if you use the actual on-set power button, it can put the TV in standby mode. Anyway, it worked for me. Maybe I just got lucky, but this has happened to be twice before I figured out to wait the 24 hours to turn it back on and it worked. Good Luck P.S. Don't ever buy another Toshiba TV.......

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