If RESET_IN is low, then U44 (74AC05) should invert to give RESET* as high signal to CPU
Possible causes:
1) U44 not getting + 5V power
2) U44 is bad
3) Some other device wired to RESET* is shorting to ground (pulling low)
But you also said RESET_IN at connector was not changing - that needs to be repaired as well.
