Is the JWST in a state where they can open it up and inspect? Or are they just going to run simulations to see if the shock/vibration would cause any anomalies?
Because it's only a 4 day slip, they'll start with simulations to look for any systems that may have been damaged. If they don't see any issues assembly and launch will continue.
If simulations show that this may have damaged a component, we'll see a longer delay as they begin replacing systems.