Question about Toshiba 42H81 42" Rear Projection Television

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Toshiba 42H81 Blinking on and off light

Had the TV on the other day and went to the mailbox, when I returned a few minutes later the TV was off and the button that turns the TV off and on was blinking (red). I Unplugged it several timie but keeps blinking. The TV is 5 years old and been in the shop 5 times to fix various problems. Im ready to give up unless this is a simple fix.

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I beleave you have bad convergence ics . when thay shorted thay probly took out 2 chemical fuse parts 2 stk392-110 2 5 amp chemical fuse

Posted on Apr 01, 2007

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Very common problems with this TV set. Toshiba even has a technical bulliten on this and several other models of tV set. The negitve terminal of C809 and C810 need to be soldered, as there are no eyeletes in the printed circuit board. This problem could also take out the fuse, F860. Replace if necassary. Good Luck

Posted on Apr 01, 2007

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1 Answer

Tv won't turn on


good day sir, problem with your tv's switching power supply, at this point you have a choice of visiting/calling your service center, or do it your own? If you want to do it your own, you may need you dissassemble your tvs back panel, to have access to the circuit, locate the switching power supply section and test the following.
  • the switching power transistor usually with a heatsink.
  • the oscillator circuit, with a pulse width modulator IC that controls the switching.
  • the high speed power transformer.
  • the feedback circuit.
  • the capacitor and voltage regulator.
test all of them until you get the bad part. I don't want to sound technical, but thats how service centers do it. You may need to get schematics.

I suggest you call your service center, and let them do it.

Oct 02, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

Tv turns off


Hi, your power board is in a weak state. this is being caused by major component failuer. replacing the power board will fix this issue.

Jul 09, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

My Toshiba Rear projection TV Has A blinking power light


The power supply is in protect mode. There is most likely a short on one of the boards, or the high voltage generator, or a scan amplifier, or the power supply itself has a failure. Without troubleshooting the set it is impossible to know.


Jerry G.

Feb 19, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

No picture or sound on my toshiba tv


In this unit it's likely the convergence amps are the cause. Those and possibly the 2.2ohm resistors (especially R7726) in the yoke return path - that's why you found the open fuse.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

Oct 21, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Power light blinking


I have a Toshiba 42H81 that has the power indicator light blinking and the TV will not turn on

Oct 14, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

I have a Toshiba 42H81 that has the power indicator light blinking and the TV will not turn on


Replace the convergence amps and check the return resistors in path to the yoke from that circuit.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

Oct 14, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

TOSHIBA TV NO SOUND NO PICTURE, POWER LIGHT IS ON


the lamp in the projector might have went. try replaceing it. to do so try

ADTECH SYSTEMS they may help

there in mass.
call David Crepeau at 978 261 1087 tell him Ryan Bolduk sent you
depending where you live. They maybe able to send someone out from there sub company

Sep 18, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba 42h81


have you try to switch it on using the contol on the tv..?

Jul 20, 2008 | Televison & Video

1 Answer

Power off automatically, the red light in front of the tv blanking, remote / button can not shut off tv, only unplug the power. After 20 seconds replug the power, tv turns normal, but it happen again and...


Good Day,lizbg;
Check the solder connections at the negative side of both C809 and C810. Resolder if necessary. This a common problem with model.
Good Luck, Big Irish.

Jun 14, 2008 | Toshiba 42H81 42" Rear Projection...

2 Answers

Tv cuts off and green light flashes


the tv will try to reboot a few times. just let i try and eventually it will start blinking red. if you could count the red blinks then i can further assist you.

Sep 23, 2007 | Sony Grand WEGA KDF-60XS955 60" Rear...

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