Not going complete full screen

4k is about 3.5 times the resolution of 1080 and gives a clearer picture

, clicking Control Panel, and then, under Appearance and Personalization, clickingAdjust screen resolution. Click the drop-down list next to Resolution, move the slider to the resolution you want, and then click Apply. Click Keep to use the newresolution, or click Revert to go back to the previous resolution.

Change your screen resolution - Windows Help - Microsoft Support

https://support.microsoft.com/en-gb/help/14108/windows-7-change-screen-resolution How to fix screen resolution Google Search

Nope. The picture resolution has to be 1080 to fill the screen completely. Using stretch and zoom will distort the low rez pictures. No option to change resolution on the TV itself.

max res is 720p.

Changing the resolution of 720 to 1080 is dependent of the input television. Make sure the HDMI cable connection or a PC cable connected properly.
If you uses a PC input, you should set the resolution with 720 to 1024 first. then set to higher resolution. If there is a problem when doing settings dark picture or not support, it means that the TV does not support the resolution.
Perform way above the HDMI connection too.
Hope this helped solve your problem.

try to change the resolution of the output from the computer to 1920x1080 if your tv is a full hd tv.you can do that by going to control panel display settings if you have pc for mac click on apleicon on top left corner and go to system preferences where you can find display preferences which will help you to change screen resolution.
if your pc and tv has an hdmi port connect the tv and computer via hdmi cable

Try adjusting the Screen Resolution to a different size. Based on your operating system you can right-click in the center of your desktop and select either (xP) Properties then the Settings tab or (Vista/7) Screen Resolution and under the Resolution area try adjusting the slider and click Apply until you get one that fills in your complete LCD.

The TV will display the signal it is being fed with and adjust itself according to the video signal resolution. The video source tells the TV what the resolution it should display. 720 in 720 out on the screen, 1080 in 1080 on th screen (if TV can do 1080p or 1080i).
What kind of signal you are feeding your TV with.
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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I BELIEVE THE ISSUE IS THE RESOLUTION THAT THE VIDEO CARD IS SET AT. IF YOU ARE USING THE SAME RESOLUTION AS THE PC, IT WON'T WORK.

TRY SETTING THE VIDEO CARD RESOLUTION AT 1920 X 1080. THIS SHOULD WORK.

ED P

Change you screen resolution to lower resolutions, like 640x480, connect it. if you get video, move your resolution up and test which ones work for you TV. Try to stay under 1920×1080.