Question about Toshiba REGZA 42WLG66 42 in. HD-Ready LCD Television

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Toshiba 42HL196. Will not turn on. Remote and TV buttons do not work. Screen cycles from dark black to backlight on. No response. I unplugged for 10 hours and no effect

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Replace the digital/siene module

Posted on Sep 13, 2009

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Sorry but you are out of luck, the unit will need repair. It could come back to life in any moment but most often is related to this:

My previous post here

Check for POWER_LCD signal valid out of AV_TERM board.

I have seen a faulty board work perfectly until the power is removed (intentionally or accidentally) an applied again or reset via the power button for 5 seconds. This will effectively disable the +12 VDC Power oscillator rendering the TV unusable.

good luck,

mrwindex

Posted on Nov 08, 2009

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1 Answer

My toshiba lcd tv has a black screen i have no picture or sound


Hello,

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. Look for 5vdc, 12vdc, and 24dvc.if otherwise TURN THE TV OFF AT THE MAINS. This will reset it to default. Wait 1 minute at least.

- TURN TV ON. Ensure you have sound so you know the video/audio feed is OK.

- PRESS THE TIMER BUTTON ON THE REMOTE
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I hope this will help to solve the problem..

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Check the DC filter caps in the power supply first. Check the 24vdc (or 18vdc for this 22" model) to see if it goes away when the screen goes black.
There are main AC fuse, backlight inverter fuses, T-CON fuses.
If you are going to DIY and have proper tools and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
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It wouls appear one of the backlights in the screen is cutting out, this will require the screen to be replaced although in certain circumstances, depending on the age & model of your TV, it is sometimes possible to change the faulty backlight independantly. Take it to a repair centre to get an anaylisis of the type of screen it has.

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back light out,panel defective.no fuse will correct your problem.panel is bad.

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When turned on, no picture, sound or response. LED is OK


I had a similar problem with my HANNSLounge 32", the screen switched on with green light but none of the front panel buttons worked (screen is black apart from showing the input source in the top left).
After powering off numerous times I tried starting up with a blank SD card in the reader and the tv cycled between red green and blue screens and then reset itself. (Some sort of firmware restore?) After which point I had a working screen again! (Will have to see how long it lasts for!)

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2 Answers

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did you try unplugging everything and resetting your cable box. then plugging it back in,
i got some faint boxes yesterday and that did the trick

Jan 02, 2009 | Toshiba 42HL196 42 in. LCD HDTV

1 Answer

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YOUR INTERNAL POWER SUPPLY HAS FAILED , CONTACT TOSHIBA CUSTOMER SERVICES WHO ARE TOTALY OUTSTANDING . WITOUT DOUBT THE BEST CUSTOMER SERVICES I HAVE EVER HAD TO DEAL WITH

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