built in electric oven

[SIZE=3]My oven heats and cooks for a while then it absolutely shuts down . There is nothing lite on the display and no buttons respond, the light in the oven works. After a while the clock will flash like a power failure, but when I reset the controls it goes blank again then I wait to let it cool down and reset and it will cook for awhile again. There has been some sort of code flash but so quickly I could not tell what it was, one time I had 8’s across the display briefly. Any suggestions other than a service call? Thanks[/SIZE]