Answers :
Look the drawing on the wall (Sun-Yellow-Blue)
This is the sequence to develop the sheet.
(red light, yellow container, blue container)
Tap the wrench.
Tap the higer cabinet.
Tap the UV light and tap the keyboard.
Print finger is now visible on the keyboard.
Code is 9-2-6
Tap the safe light inside
Lower cabinet : key is in the secret passage (3-in photo shop room)
inside cabinet : Detonator.