Question about Toshiba 40H80 40" Rear Projection Television

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Toshiba 40pw03b stuck on standby

Hi my toshiba tv 40pw03b is stuck on standby with red LED only can you help ntsure were the IC is or the pcw is if you can describe to me i might be abel to fix thankyou

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  • Anonymous Mar 14, 2009

    i have got a toshiba 40pw03b which is stuck on standby
    can anyone shed any light on this ...also do i need the remote as it got stood on accidently ,it still lights up but not sure if its working now ...ordered replacment...did yuo sort yours ronny_21 ?



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The red light comes on and off tv dont work

Posted on Aug 01, 2008

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Posted on Jan 02, 2017

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Hi all. i got 1 toshiba led tv 32pb10e problem DOUBLE IMAGE WITH DISPLAYED RED N BLUE COLOR ONLY ON SCREEN . I TRIED REPAIRED SINCE LAST NIGHT BUT CANT . PLS HELP ME IM URGENTLY NEED REPAIR IT . TQVM


The old projector TV's are using 3 lamps for Red Green Blue....in your case the Green lamp stopped working....either the Green lamp burned or the lamp board is defective.

Mar 31, 2016 | Toshiba Televison & Video

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Sony wega tv kp 51ws520 keeps turning off after the standby red light blinks 10x's


problem with str ic need replacement has an internal short need a tech to do it

Jul 08, 2013 | Televison & Video

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Tv flashes red then shuts itself off after only on for 3 min


I have not repaired this particular model. But sometimes there is an IC they refer to as a standby IC. It may also be known as a controller IC. I call it the powerline regulator. And in one case the older Sony Projection TV had an audio output IC with a standby built into this IC. So,this advice is refering to a standby IC. And this IC may be in another form already mentioned. Please visit a Sony Tech. The work inside a projection TV is very complicated, you will need to see the specialist. Give them this note and go from here. Let me know how they handle the repair.Thanks for asking and good luck!

Aug 02, 2010 | Sony KP-65WS500 65" Rear Projection...

1 Answer

Tv not turning on and red standby light flashing


Hi.

If the TV went in standby and does not wake up, staying with led flashing, then the TV has on protect mode after detecting a fault.
When this happens higher voltages are shut down to prevent further damage.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

Also ensure that the fault is not coming from a faulty receiver box sending bad signal, check if you get same problem with no receiver box or dvd connected.

If that does not work, and you keep having a flashing led on front of the TV, and tv turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible reasons.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , startingthe flashing light.


If you are in situation one, then theTV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, a convergence IC has blown, or a fault on Digital board.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

Nov 02, 2009 | Toshiba Televison & Video

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...

1 Answer

Service menu


Hi,
How to Enter Service Mode
1. Turn on the main power switch to place this set in standby
mode. (LED will light in red.)
2. Press the buttons on the commander as follows, and enter
service mode.

PRESS these buttons in sequence

ON SCREEN DISPLAY---> (DIGIT 5) ---> (VOLUME +) --->STANDBY

Method of Cancellation from Service Mode
1. Set the standby mode (Press “ (TV STANDBY)” button
on the commander), then press “ (TV STANDBY)” button
again, hereupon it becomes TV mode.


Thanks

Oct 29, 2008 | Sony KP-53HS30 53" Rear Projection...

1 Answer

Toshiba 50h81


it happens to my toshiba.. once in a while and gradually shutsdown every minute during the last 2 mos..

Mine is Toshiba 55 TZ, have it since 98', shutdown and red light blinking problem, search the net and found out, generally a Convergence IC (stk392-110) problem. bought 2 for $15 at suburban-elect.com (ebay). replaced following direction from http://www.casiasfamily.com/repairlog/tp50h15.html

Open back cover, 9 screws and wirings (pls mark), removed(soldered) a electronic board infront of convergence ic. removed IC (stk392-110) (screwed and soldered).

Replaced everything and voila...! it is now working again..
no more shutsdown and red blinking light. Saves mo $400 for a repariman. of course just be careful with static and stuff.

I don't know how to solder, so I ask friend to do it for me. But I did the rest. Just to give you an idea that it can be done even if you don't know much about electronics. This in no way a recommendation but just stating my experience. Follow at own risk.

Feb 05, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Convergence is off


Starts up with black raster, then shuts down with LED blinking 4 times
This is the micro telling you that the auto grey-scaling procedure has failed. Change resistors R909, R913 & R922 (180k, 1%) on crt base PCB. You will probably find that all these have gone high
Standby only
Check R101 (4.7ohm), TR102 (C6180) and C126 (47uF, 16V)
Tv turns on automatically. Power supply works well, +5V present but seems that CPU (7700) does not (no standby mode), no remote or control on the front of the set
After replacing CPU (TMP47C434) and crystal 1770 (4.0MHz) both control worked intermittently. Replacing transistor 7674 (BC548) solved the problem
Will not work, standby (red) LED flashing
C604 in the 12V line is bad
Int going into standby
Replace C454 a 22nF smd, located near the Frame o/p ic.

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IQC50H94W Zenith Projection tv


check the flyback/hv-spliter sounds like it could be your problem also check horizontal ic

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Red led stays on after turning off.


Aren't you talking about the standby led? cause that is perfectly normal... when it's on it means you can turn the TV on by remote, usualy it goes away when you turn the TV off manualy by pressing the OFF button on the set, but is this really your problem?

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