No picture on TV/DVD combo when connected to laptop via HDMI

I have. 2008 19LV50KW TV/DVD combo that I'm trying to use as a second monitor for my new laptop. I have it connected via HDMI port, and the laptop recognizes the Toshiba, I have windows 7 and have dual monitors enabled, yet there is only Black on the Toshiba TV (I have it on the HDMI input selection). What could be the issue ?

I've seen a number of similar posts around the internet. I have this same Toshiba TV, and my new fire TV stick from amazon will not display via the HDMI (the only option). So then I tried my laptop, and discovered that it too would NOT display.
Based on that troubleshooting, I've concluded that it much be an issue with the TV. Can this be remedied in any way? Both my fire TV stick and my laptop work on all of my other TVs. There seems to clearly be an issue with the HDMI input with this Toshiba model, and maybe more.
Please advise.

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