From the 3805 owner's manual (Step 5, Part 6 in System Setup):
5-6 Setting the On Screen Display (OSD)
• Use this to turn the on-screen display (messages other than the menu screens) on or off.
• Sets the on-screen display’s display mode.
Mode 1: Prevents flickering of the on-screen display when there is no video signal.
Mode 2: Flickering is not prevented.
Use this mode if the on-screen display does not appear in the mode 1, as may happen according to the TV being used.
Maybe this will help.
BTW, if your TV is so old that it doesn't even have S-Video, maybe it's time to upgrade?
Jason