Nintendo 64 Console "lose audio changing channels" Questions

Nintendo 64 audio video problem, the screen goes similar to losing signal on an antenna channel Originally i thought i had a problem with Super Smash Bros but then i changed the game and i still saw ...

...lose the memory by holding the on/off button down for a few seconds. It works to get the display back after running on HDMI. Thanks xxallstarxx yes hold the button i had same problem now works fine ...