It’s fixed! I activated DVS accidentally. The INT button was not highlighted so the board was temporarily “disabled!” I just deactivated the DVS so I wouldn’t run into this problem again. Thanks for your help!
https://forums.pioneerdj.com/hc/en-us/community/posts/360049482292-DDJ-1000SRT-Serato
Found from this thread.
All sorted.
Thank you Ron Johnson for replying with the fix.