Question about Toshiba 57H81 57" Rear Projection Television

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I have a 54" Toshiba TV Model # 57H81. The only thing it does when I turn it on is a small red light in the front is flashing. Please help me! Thank you so much!

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It has a two str regulator try to voltage check each one if the other one has no supply check the convergence ic.

Posted on Oct 14, 2010

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If you have some garbage in the main processor you need to leave it unplug for 40 MIN, to reset it back to normal. If that don't work then you need to check for a shorted horizontal transistor, mounted on a metal heat sink near the fly back transformer, that is what turns your high voltage on.. If that is good , then the next common problem would be is a bad convergence module, and you are looking at around 400 on repairs.

Posted on Oct 14, 2010

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Have toshiba 2002 projection tv model 57h81 when plug in red light on front where power button is the tv has no sound and no picture please tell me what it means or is too expensive to fix not worth it...


9f2965aa-94e3-4244-a87e-5f0264d7f11c.jpgthe price of the parts depend on the problem I have done a problem part list on to this picture hope this help most of the parts if you type them into ebay the parts will come up check them to the one on the board. sorry had to change the size of the picture as it has to be under 500k. switches are in the red ring if they don't click when you try to turn on or just keep clicking then i would check them. you should be able to download the picture and enlarge the picture so you can see the problem areas i have put on it hope this helps there is a bit of soldering to do to replace them if you need more help please reply.

Oct 21, 2013 | Toshiba 57H81 57" Rear Projection...

1 Answer

Toshiba 57H81 Blinking power light


Greetings,

Power supply cannot sustain / provide juice to the whole system.
If you are qualified to do electronics, check the power supply section, otherwise contact a repairman.

Keep us posted and thank you for using our service.
FixYa for all your troubleshooting needs.

Jun 29, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

When i turn on the power button it wont power up the red light just flash.. its an older model tv


You need to replace 2 ICs they are big black ICs and will have part number on them ,example STK392-110. Mats has ICs 1-800-628-1118

Mar 01, 2011 | Toshiba 57H81 57" Rear Projection...

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57H81 57 in. Rear Projection Television: My Toshiba model 57h81 is 5+ years old. It just s...


I had the same issue with my 57 in. Mitsubishi. I fixed it by buying a new projection bulb. The Mitsubishi manual indicated this was the fix for my Mitsubishi TV. Be advised that new projection bulbs are not inexpensive. My TV works like new once the projection bulb was replaced.

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MY SAMSUNG TV MODEL NUMBER LE32R87BD IS DISPLAYING A RED FLASHING LIGHT ON THE POWER BUTTON AT THE FRONT OF THE TV THERE IS NO PICTURE PLUS IT WONT TURN ON CAN ANYONE ASSIST ME WITH THIS PROBLEM

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Toshiba model 53h71 will not turn on


I have the same problem - just happened last night. I found this posted on this sight. Does your problem sound the same?


http://www.fixya.com/support/t1482810-toshiba_57h81_flashing_red_power_light

Feb 03, 2009 | Toshiba 57H81 57" Rear Projection...

2 Answers

Toshiba 57H81, power to transformer and flyback.


IF YOU REPLACED THE SAME PICO FUSE, YOU PROBABLY HAVE A BAD CONVERGENCE IC AGAIN . DID YOY SNUG UP THE IC TO THE HEAT SINK AND USE THERMAL HEAT COMPOUND ON THE NEW IC'S? ALSO CHECK SOLDER CONNECTIONS TO C810 AND C809 THE FUSE BY THE CAPACITORS MAY BE OPEN.

Jan 22, 2009 | Toshiba 57H81 57" Rear Projection...

3 Answers

Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

Jan 04, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Toshiba 57H81 57" TV Power


I have a toshiba 55hx70 same problem,repair guy just left said it was the power supply and wasnt worth fixing 350 to 400 dollars The tv is 9 years old and they wouldnt even take it to shop. Its been a great tv firs thing to go wrong.. Wo nder if I could replace it myself???

Dec 22, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Tv won't turn on


You will need a service manual to troubleshoot the set to be able to find whats going on with it . Its in shutdown mode with the led flashing. A good manual is available at this link.
http://servicemanuals.vstore.ca/

Mar 19, 2008 | Toshiba 57H81 57" Rear Projection...

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