F8 ROM

I have an original Apple II computer with what looks like integer basic ROMs. However the F8 chip is not the typical 3410004
It is a

Synertek
7845E
C48037
AIMB-F8

For some reason, I can not get a beep or a prompt, while booting to the integer basic ROMs. I do get regular video.

I do get a beep and a prompt when using a ROM card with apple II + ROMs.