I've also just purchased an Audiosonic KM1903 19" LCD TV on ebay, although this a K-Mart Brand and had trouble following the manual so I wrote my own simple instructions as follows:
PRESS THE MENU BUTTON TO DISPLAY MAIN MENU
PRESS THE DOWN ARROW ONCE TO DISPLAY TV SETTINGS
PRESS MAIN MENU BUTTON AGAIN
PRESS DOWN ARROW 6 TIMES
PRESS MENU
HIGHLIGHT YES USING RIGHT ARROW KEY
PRESS MENU
WAIT WHILE THE UNIT SCAN FOR AND SETS TELEVISION
WHEN DONE PRESS EXIT TWICE TO EXIT THE MENU SYSTEM
TO SKIP UNWANTED TV CHANELS SET THE “SKIP THIS” TO “ON” UNDER tv SETTING – REFER PAGE 9 (REMOVING A PREFERENCE)
Kathy
September 2008