Question about Toshiba 57H81 57" Rear Projection Television

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I have a 57h81 no picture no sound red blinking light

I have red some other info on this they all say the convergence board thats great in all but i need to know the part number for the 57h81 convergence board.

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Dont have the board number but it's the one with the silver heatsinks
Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
http://www.hdtvoice.com/voice/showthread.php?t=28929
Or send to ptscorp.com

Posted on Feb 07, 2008

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The red lens on my projection screen dose not seem to line up right the picture is fuzzy and it will not moveback in alignment with the remote


Tv board call the Hyper board also known as a tv convergence board it is dead.Tv have any R,G,B colors lines mis alignments,have colors shadows pictures or 3D pictures look alike?Yes,than the tv convergence must have it parts to be replaced like 2 STK convergence ICS and some or all of it resistors too.To fixed the the Hyper board also known as a convergence board will fixed tv picture convergenece problems.Tvs shops will cost u like $300-350 for parts and labors.

Aug 22, 2011 | Toshiba 57H81 57" Rear Projection...

2 Answers

My Panasonic 1080i is not turning on i press power the green light turns on but the screen stays black. then eventually the light turns red. another website instructed me to order STK392-110 some chip...


First, if the convergence chips are bad or shorted the set will shut down and the power light will blink three times in a sequence--if no three blinks I would suggest another possible problem common to this set.

Before the set shuts off do you see anything at all on the screen after a minute or two? A strange band of noise from top to bottom on the right side? The more information you can give me the better the chance I can tell you exactly what is wrong---I have fixed hundreds of these sets--

I am here to help--give me all the information you can

SD TECH

Oct 08, 2009 | Panasonic PT-47WX53 47" 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...

2 Answers

Blinking light without picture on Toshiba 57H81


No good news here sorry!

Power board and video X and Y boards need intervention If you are going to take a look you will find that one or even both boards have blown capacitors and burn marks along the transitor

You might be able to claim it as fusion on your insurance policy ( parts only usually) but thyat at least is some relief


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Aug 31, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Blinking power light & black screen on toshiba 57h81


This TV could have one of several problems including but not limited to; convergence IC's,bad capacitors, shorted horizontal output transistor. Call a good TV Tech. Check with the BBB before you decide on one.

Jul 11, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

F470 fuse location


REPLACES THE CONVERGENCES IC'S

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...

1 Answer

6 red blinking codes


Below is picture of error code table of Sony TV KP-57WS500You can check what is error 5 and 6

6166b85.jpg

Oct 31, 2008 | Sony KP-57WS500 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...

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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