I assume this is for the ODROID-C1?
I doubt the config is the same but with the Raspberry Pi these things are all controlled by the /boot/config.txt file (
http://elinux.org/RPiconfig). Is there something similar to play with?
From the TV side, and only if your TV supports it, the aspect ratio to use for no overscan is usually labelled something like:
Just, 1:1, Pixel Direct
And sometimes these modes are only possible on a "DVI" or "PC" labelled input.
Edit: Looks like boot.ini might eventually be useful -
http://odroid.com/dokuwiki/doku.php?id=en:c1_tips#how_to_change_u-boot_configuration_by_bootiniEDITED: 23 Dec 2014 10:00 by ANT_THOMAS