A319
After 2nd engine start, ECAM
HYD BLUE SYS LO PR. HYD Page shows 3000 PSI (normal) but F/CTL Page shows
B for all BLUE system components (abnormal). So contradictory indications for BLUE system.
Previous night the engineers had tested the RAT (BLUE system..) and had left the leak measurement valves in the open position i.e. selected "ON" on the maintenance panel (on the o/head panel towards rear of flightdeck). The aircraft had then been depowered with valves in the maintenance position. On power up the lights on the panel were not noticed (
apparently they will be on).
Fix: Deselection of LMV returns system and all indications to normal.