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The Toshiba 40PB200 is a 40-inch flatscreen television in the PB200 series. It was released in 2012.

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Why is my TV blinking?

We have a Toshiba flat screen LCD that constantly blinks -- goes dark for a half second like the LEDs are turning on or off. Changing the picture mode can alter the rate of blinking but I cannot get it to stop altogether (although this has worked in the past). Any suggestions on how to fix this?

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So do you have to get a new tv

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I've been having this issue about a month now. It comes and goes...so I'm a bit confused. Ant solutions? Or suggestions to self check before taking it to be repaired?

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I’m not seeing a way to adjust the setting without the TV remote… Is that true?

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I raised my back light to 100 and it started blinking faster as I went up. I lowered it to 60 and there’s no blinking

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How can u adjust the back light I've tried won't let me

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@alf222 let us know the exact model of your TV. If it is the screen that is blinking it is possible that you have a bad power board/LED driver or a bad LED array. Post some good images of all of your boards with your question so that we can see what you see. Use this guide iFixitでの質問に画像を追加する方法 for that.

Update 01/19/2024

Just to clarify why decreasing the backlight will work (for a while). As one decreases the brightness, the voltages to the backlight strips will decrease. Less power = less heat. That will keep those strips illuminated for longer. This may or may not work for a while. For a permanent repair, the backlight strips that will require replacement.

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@alf222 Thank you, lowering the back light and then raising it to 80 (too chicken to go higher) worked, no more flashing on and off picture

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I have a 2 1/2 year old Toshiba that blinks on and off. How do I reduce the numbers spoken about above.

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I've got a 50 inch Toshiba telly in mind links as well he actually gets on your nerves after a bit and it's only 3 years old I don't know what to do about it either I'll try turning my back light down to 18 see if that works but if anybody else has got any suggestions what it might be won't mind knowing also just go out and buy a new telly and not a Toshiba one this time or all tell us the same thank you

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I just fixed a 70 inch Vizio with this problem. It was a dead completely shorted diode on the power supply for the backlight driver. Since this problem can often be fixed by turning the brightness down it is almost certainly either the power supply or the LED strips inside the display panel. I would start with the power supply first though.

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It appears that adjusting the back light worked like a charm! I did notice that changing the 'Picture Mode' from ie Movie, PC etc to Gaming helped reduce the blinking on my TV (yours might need to be adjusted to one that works for you).

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One of the chips is overheating. Use freeze spray to identify it, unsolder the heat sink, clean well, then use a good heat sink paste and resolder the heat sink back on. You can try turning the backlight down in picture settings as well. Menu-picture-Backlight. It is factory set at 100. Try turning it down to 50, then bump it up by 5 until the picture blinks. Bump it down 10 or 20 from there.

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Amazing. Everywhere else said I needed a repair. I lowered mine from 100 to 80 and it stopped blinking. Its a little dimmer and I will probably still need to get the repair at some time but this will work well for now.

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I turned the backlight down it worked

I turned the backlight down then reset the picture it worked on mine.

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I turned the backlight down on my 50inch toshiba and it worked

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Mine is toshiba with roku. Decreasing brightness helps.

i have also fixed before by cleaning. Take the back off, vacuum inlet filters, use a soft brush on all exposed surfaces to remove dust while vacuuming.

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I have a Toshiba. Flickering was driving me nuts. Lowered my backlight to 54, flashing stopped! Fingers crossed, l hope this is a permanent fix.

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Mike Fuhr さん、ありがとうございました!
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