Question about Toshiba TP50H95 50" Rear Projection Television

Open Question

Toshiba Cinema Series Model TP50H95 - Will play fine then just shut down

The TV, when it plays, it is perfect. It will go for days with no problems, then just shut down. Sometimes just for an hour or two, and at times, for over a day. Does not seem to be temperature related, as it happens with room temps warm and cold (room temps in mid 60 deg F). I placed a fairly large fan blowing diagonally across the back of the unit just in case the heat was building up - made no difference. I understand there are two main logic/circuit boards, Could a board going bad cause this and if so how to determine which one and where to go to replace it - or whatever else might be causing the problem. There appears to be no pattern for how long it will run, or how long it stays shut down.

Thanks for any help - JL

Posted by on

6 Suggested Answers

  • 3130 Answers

SOURCE: Toshiba model 57H81

If you have zagged lines there are 10 small surface mounted capacitors you will need to change on the HYper Board. This is not an easy repair so alot of folks simply replace the hyper board. You will need a service manual to take this set apart and to get the proper part number. If you have no TV repair experience or do not know how to solder, as the hyper board has sheild arounfd it, you should play it safe and call out a pro to assist you in this repair. Good Luck

Posted on Mar 19, 2007

  • 206 Answers

SOURCE: Toshiba TV repair

You say it's a DLP yet the model number shows as a standard projection, anyway what you seem to have is a Hyper board problem, many shops can repair this Fragile board but it's not for the weekend tv tech to try to do

Posted on Feb 13, 2008

  • 8617 Answers

SOURCE: Toshiba TP50H95 TV Won't turn on - Pete

You will need to trouble shoot the start up and shutdown circuits. Often this is a minor component failing causing the set to not power up or go into protective shutdown. Do you have the service manual for this TV?

Posted on Mar 02, 2008

  • 2 Answers

SOURCE: 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.

Posted on Jan 05, 2009

  • 111 Answers

SOURCE: slight convergence problem after changing convergence circuits

My experience has been that the resistors have fallen out of range. These aren't expensive and neither are the caps that surround this area. If you're pulling the board out to change the resistors, might as well change the caps, too. If you're strapped for cash, but have a multi-meter, you can test the caps and the resistors after they've been taken out of circuit to save a little green. Let me know if you need any help testing them; I'd be glad to help.

Posted on May 22, 2009

SD Tech
  • 14553 Answers

SOURCE: TOSHIBA 57H82 TV Blurry for 15 minutes till warms up

This is a model first sold 2002.

They have a history of the Hyper board failing. Usually noise or lines in the picture and the warmup time gradually gets longer and longer.

This board processes all signal from all inputs inside the set and is no longer available from Toshiba.

The only way to get one is from a national company called PTS Electronics who rebuilds or repairs them--cost for rebuilt board is about 220 plus shipping and part number for this model is:
Part Number23148024

I have a service bulletin with photos of the board on my computer.

It is a financial decision, not a job for the average do it yourself person to attempt.

Let me know if you have questions or need help.


Posted on May 03, 2010

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


1 Points

Related Questions:

2 Answers


thermal sensor is working, what's the reason?

Mar 13, 2008 | Projection Televisions

2 Answers

I have no sound

go to menu settings and check audio on?

Jul 10, 2009 | Projection Televisions

1 Answer

TV will not turn on

the convergence amps might need resoldered. thias is a common problem after the run for a few years

Jul 10, 2009 | Toshiba TP50H95 50" Rear Projection...

1 Answer

Picture often flickers and image distorts every few minutes

The trouble is most likely in the Video processor. If the trouble looks like its tearing the video only from side to side it may be the line doubler circuit. Some of these boards are no longer available but a good TV tech may be able to componnent level repair it for you.

Apr 15, 2009 | Toshiba TP50H95 50" Rear Projection...

2 Answers

Toshiba TP50H95 TV Won't turn on - Pete

You will need to trouble shoot the start up and shutdown circuits. Often this is a minor component failing causing the set to not power up or go into protective shutdown. Do you have the service manual for this TV?

Mar 01, 2008 | Toshiba TP50H95 50" Rear Projection...

1 Answer

Toshiba Cinema Series

possible regulator ic. in the power supply.

Nov 20, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba TN61X81 HD Cinema Series Sound Problem

what type of connection did you use for your playstation 3 to your tv....

Aug 10, 2007 | Toshiba TN61X81 61" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

155 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Dave Naylor
Dave Naylor

Level 3 Expert

834 Answers

The Knight
The Knight

Level 3 Expert

66509 Answers

Are you a Toshiba Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides