I spoke with Toshiba… the representative said that it is a Google Chromecast issue and that if I purchase a Google Chromecast and plug it into the TV it should work just fine. Apparently they (Google) discontinued working with this TV model.
My TV worked fine, not one issue until it just turned off one day. Then wouldn't turn on. Had the same issue happen. Screen turns on then off. I tried installing a “New" firmware on the Toshiba website and the TV would stay ON!!! So I know it's not a power issue or a screen issue! The update didn't work but due to the screen staying on I know that it may work if I purchase a Chromecast. I am currently waiting on my purchase. Will update once received and tried.