Question about Toshiba 57H81 57" Rear Projection Television

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Toshiba 57H81 My Toshiba 57H81 has power but, no sound and no picture. Red light by power button is on and not flahsing.

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Re: Toshiba 57H81

Check all fuses in the power supply and look for any bad connrctions on the PCB. You are probably missing the 130 volt supply to the horizontal circuit. Common reasons are: Shorted horiz output transistor; flyback transformer, picture tube arcing , bad power regulator IC. In short, you need to get a qualified tech for this symptom. Hope this helps.

Posted on Nov 25, 2007

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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...

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Toshiba 57H81 Blinking power light


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

Toshiba 57H81 Rear Projection TV Problem

IT is possible that the power connector in the back of the set is either faulty or broken, you would have to go into the back of the set, and look and see in the connector to the power board isloose, if it is, then you might be able to resolder it on. If not, then there is a problem with the plug, try a different outlet.

Jan 10, 2008 | Toshiba 57H81 57" Rear Projection...

1 Answer

Blinking red power light. No picture or sound.

Sound to like the lamp is burnt out. I would start by replacing lamp.
Good Luck.

Nov 21, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Red power light continuously blinking. no picture no sound.

It could be the lamp went out and needs replacement. The Toshiba website states when this happens to unplug the televison for 10 minutes then plug back in. If that does not work then try another power outlet. If that does not work then call for service

Sep 12, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Pop sound and now no picture or sound still gets power

Try disconnecting all the cables from the TV then reconnect them after a few minutes. It's suggested that you connect the power cable from the TV directly to a functional wall outlet.

If still there is no picture on the TV then it's required to replace the projection lamp.

Sep 08, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

F470 fuse location


Mar 19, 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...

3 Answers

Toshiba 57H81 Blinking power light

This sounds like the typical toshiba power regulator ic fault. it begins with an str##### Its not something a handyman should try to tackle. It should be repaired by a quilified repair person Sorry Good Luck

May 22, 2006 | Toshiba 57H81 57" Rear Projection...

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