You can refer to this site to get the latest generic drivers for that video controller:
Keep in mind that Intel makes available generic versions of the Intel® graphics drivers. However, Intel always recommends that you check with your computer manufacturer and use the latest Intel graphics driver provided by your computer manufacturer. Your computer manufacturer may have altered the features, incorporated customizations, or made other changes in the drivers they provide for your computer. To avoid any potential installation incompatibilities on your computer, Intel recommends that you first check with your computer manufacturer and use the driver provided by your computer manufacturer.
I suggest you to try all the troubleshooting posted on the following article:
In additon try using the special driver posted here:
Furthermore, be sure to test this without any device between the computer and the TV, so use a direct connection without any adapter, converter or the specially without the receiver that you are using.
Perhaps you already know this but anyway...
I also have a Panasonic tv and there is a setting called "overscan" in the tv settings menu that can be turned on or off. It should be set to off. Otherwise the tv will crop the image that the graphics card gives it.
I did not know that. That was the problem, a setting on the TV itself. Thanks!