TV giving me "No Signal" when hooked up to computer via HDMI

[LilCoach]

The title says it all.
I had a TV just sitting in my room unplugged, so I decided to put it to use as a 2nd monitor.
I hasn't worked...
I have been searching for hours and hours and not a single solution has worked. I have tried multiple working HDMI cords, and nothing changes. My normal monitor has a DVI or VGA cable (Or what ever it's called, it's blue and has screws to secure it in place) and works fine. I tried to plug the TV up with the same cable, and it worked! But now the monitor won't get outta "Power Save" mode, or whatever. And I tried that part with multiple HDMI's as well!
I managed to get it to where If I put my mouse out to the side far enough, the mouse acts if it is working and goes thru.
I don't care about audio, b/c I have Head Phones that plug directly into my computer and they work fine.
It's an Insignia TV. That alone may be the problem, but I'm filled with DETERMINATION.

Ask me anything you need to know. Also: the model number for the TV is NS32-D120A13, if that helps.

Thanks in Advance, LilCoach

EDIT: Just to be clear, I have a Desktop, not a laptop. And yes, I've tried WinButton + P to try and fix it, and it didn't work.

 

[ffg7]

the blue connector is vga & the white is dvi. what are your system specs especially the videocard & motherboard? is the monitor now working again with the vga cable?
Connecting a computer
Using VGA
To connect a computer using VGA:
1 Make sure that your TV’s power cord is
unplugged and the computer is turned off.
2 Connect a VGA cable (not provided) to the
PC IN VGA jack on the back of your TV and to
the VGA jack on the computer.
3 Connect an audio cable with a stereo mini plug
(not included) to the PC IN AUDIO jack on the
back of your TV and to the AUDIO OUT jack on
the computer.
4 Plug your TV’s power cord into a power outlet,
turn on your TV and the computer.
5 Press INPUT to open the INPUT SOURCE list.
6 Press

 

[LilCoach]

the blue connector is vga & the white is dvi. what are your system specs especially the videocard & motherboard? is the monitor now working again with the vga cable?
Connecting a computer
Using VGA
To connect a computer using VGA:
1 Make sure that your TV’s power cord is
unplugged and the computer is turned off.
2 Connect a VGA cable (not provided) to the
PC IN VGA jack on the back of your TV and to
the VGA jack on the computer.
3 Connect an audio cable with a stereo mini plug
(not included) to the PC IN AUDIO jack on the
back of your TV and to the AUDIO OUT jack on
the computer.
4 Plug your TV’s power cord into a power outlet,
turn on your TV and the computer.
5 Press INPUT to open the INPUT SOURCE list.
6 Press

I don't pacifically know my specs, only that my Graphics Card is a Nivada GeForce 8600 GT. And yes, My monitor is working properly with the VGA. And why do I feel like those derections at the end are copy pasta?

 

[ffg7]

because they are as did a copy & paste from the pdf manual of your tv. you have a big rectangular connector besides the vga on that card, don't you?

 

[LilCoach]

because they are as did a copy & paste from the pdf manual of your tv. you have a big rectangular connector besides the vga on that card, don't you?

Oh, Haha. And no, I don't..? It depends if you mean a rectangular port or a cord that came with the TV.

I'm using the only VGA I have, which has all ways been in my Monitor, if it's the ladder.

 

[ffg7]

what connectors do you have on your videocard as vga is 1 of them?