Measure J5 pin 8 to Ground, should measure 4.5k. If not then check R7 (1.5k) and R8 (3k) for anything missing or a damaged trace.
Measure J5 pin 8 to U1 pin 78, should measure 1.5k. If not look for damaged trace.
Measure J5 pin 10 to U1 pin 10, should measure 0 ohms. If not look for damaged trace.
Measure J5 pin 12 to U1 pin 11, should measure 0 ohms. If not look for damaged trace.
If all of the above checks good, then suspect U1 has an issue.