HDMI connection lost

I have a Toshiba laptop running Windows 8 (see below)

For months, I have used HDMI to connect to my Vizio TV .

Suddenly, the connection began giving e problems. I tried playing with the setting, setting the monitor selection to the TV. Now, when I connect the HDMI cable, both the tv says 'no connection' and the laptop screen is black.

The option I used to change the settings is gone.

Someone suggested connecting the HDMI cable and trying to detect the tv, but the laptop screen is black! I can't do anything while the HDMI is connected.

Any suggestions?


Thanks in advance!

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8, 64 bit
Processor: Intel(R) Core(TM) i7-3630QM CPU @ 2.40GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 8
RAM: 8076 Mb
Graphics Card: Intel(R) HD Graphics 4000, -1984 Mb
Hard Drives: C: Total - 600061 MB, Free - 526563 MB;
Motherboard: TOSHIBA, Portable PC
Antivirus: AVG AntiVirus Free Edition 2014, Updated and Enabled