Question about Toshiba 36A40 36" TV

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Picture way too dark

Toshiba 36A40. I can't get the picture to lighten up enough any more. The contrast is adjusted all of the way up with the lightest screen mode selected. Is there anything a layman can do?

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  • Anonymous Jan 26, 2008

    screen is too dark. Brightness control is maxxed out



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Good day,

There is an adjustment on the rear portion of your units flyback. It controls the screen brightness. Check out on this.


Posted on Mar 23, 2008


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My tv screen is to dark how do I lighten the picture

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there so many things which can cause that to happen an these are thwe following,
i a tube has to be tested
ii a line transformer
iii vedio amplifier
this tests can be done in w/shop where other tvs are of the same.

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If it can't be adjusted you have a problem with the biasing circuitry. Probably a bad bais IC resistor pack.

Mar 09, 2009 | Toshiba 36A40 36" TV

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If this just happens while vcr is playing. Check the vcr. Did you happen to adjust its brightness and contrast settings. If things doesn't change. Then if this model is a crt type could be adjustment on its flyback transformer is needed tweaking slowly its screen knob or tweaking also its focus knob until you got it to the level of viewing it correctly.

But be aware, hazardous voltages inside it. Or let th technician set it for you, its a minor adjustment.

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Open up the back of the set but be very carefull. Notice a large black block with a large red wire that runs up to the picture tube. on one side of that large block where the thick red wire is comming out of are two controls, one should be marked focus or F and one should be marked screen or S. With the set operating normally and not touching anything else, slowly turn the control marked screen or S clockwish till the picture gets bright enough. If you go too bright the set will shut down or you see small thin white lines so back down on the control. then touch up the focus and your good to go. good Luck.

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