have a toshiba 3327db television i can enter service mode by pressing the f and a/v button and keying in 1048 to give the M in top right corner then use the picture/sound button to select option to change then using audio up down to change the settings. after playing around with the settings to correct a pincusion effect which i corrected i found for some reason i cannot now bring up the teletext which was working fine before i entered service mode. i think i may have inadvertantly altered something in service mode whilst poking around. anyone any ideas what i could have done wrong.? or anyway to do a factory reset on this model.?