The default plug and play monitor settings doesn't work with your TV. Especially after I glanced at the specs of the TV...1366x768 resolution but HDTV up to 720p...
Check which ports you are connected to and its limitation, Displayport 1.x, HDMI 1.x, VGA, DVI-D,etc
Best way is to create an inf file with the TV specs and install it as monitor driver if there's none provided by Akira. Can be complicated and dangerous if you use wrong values.
Next test is to change the panel scaling via TV OSD, e.g 1:1, aspect ratio, etc . Read TV manual
Finally, change how the resolution scale in the graphic card control panel. Either GPU based scaling or panel based and the mode on how it scales, center, full panel , aspect ratio, etc. Read GPU manual. Also you can create custom resolution to match your TV specs exactly, again complicated and dangerous (similar to inf file).
Too tough? Buy a proper monitor with proper drivers or a TV with a proper EDID/plug and play support..