YouTube videos only play on unplugged Toshiba - dark otherwise

Toshiba laptop. Videos from YouTube go black unless it is unplugged...user has upgraded the drivers. Any idea what could cause this and how it can be remedied. Thank you.
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Tiborg GuaranaIT beginsCommented:
Try with this. Or you can tell us which graphic card are we talking about.
Hello ThereSystem AdministratorCommented:
Which drivers? Chipset drivers? Video drivers? Start with that. Check the compatibility of these drivers if the laptop is older.
Is there any power management tool installed?

Try to change the power plan to High Performance.
Most Toshiba laptops have 2 graphics cards. One could be NVIDIA which is a higher performance, the other one an Intel card. The Intel card is usually more energy efficient so that is most likely the default when the laptop is not plugged in, the secondary card, is usually the higher performance card. This Card is most likely utilized when the laptop is plugged in. This would explain the two separate responses when plugged in and not plugged in.

This however is just an educated guess at the moment as we do not have any information on the model or the exact errors.
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agwalshAuthor Commented:
It's a Toshiba L-50D-B-179. I've attached a video that shows what happens..
I believe I was correct

Intel's Core i7-4500U processor is installed in Toshiba's Satellite L50-B-182. Intel's HD Graphics 4400 is integrated into the CPU. The laptop additionally sports AMD's Radeon R7 M260 dedicated graphics card. This graphics chip is, however, from the lower mid-range, and it only conditionally allows smooth gameplay. However, the 8 GB of working memory is very satisfying, just like the relatively large hard drive with a capacity of 1 TB.

I would go to Toshiba's website and download the latest graphics drivers from the site for Both Cards. There is an ATI Radeon card as well as a HD Graphics 4400 card in that computer that you will need to get and install drivers for.

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agwalshAuthor Commented:
solved the problem - THANK YOU!
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