try cleaning the game and blowing any dust out of your 64. I was having a similar problem when my games would just cut to a black screen every 5-10 min and I would have to restart the system.I unhooked all cables, blew any dust out of the game as well as every vent/opening on my 64 and reinserted the expansion pack. Took me a couple of tries, but now everything is working normally. Good Luck
Favorite games of all time Star Fox series, F-E-A-R series, Monster Hunter series, Anything for Nintendo 64
Yeah not sure why, but mine is resetting more frequently now. I cleaned everything outside of the shell and tried different game. I think it has something to do inside. I don't have the special tool to find out tho.
I am Matter...I am Anti Matter...I can see the past...I can see the future...I can consume time...and I'll consume you!!!