The ipper mirror(s) used to switch between inputs/outputs are secured by locking screws to prevent movement during 
transport.
These locking screws must be removed before turning on your Andor Shamrock spectrograph.
No power should be applied to the spectrograph at this stage.
500i Model
If your Shamrock 500 has a dual input option, there are locking screws located as shown in the following gures:
Figure 5: Location of the Shipping Screws (Shamrock 500i, Dual input Model) (1)
If your Shamrock 500 has a dual output option, there is a screw located as shown below:
Figure 6: Location of the Shipping Screw (Shamrock 500i, Dual output Model) (2)
Flipper 
mirror 
locking 
screw
Flipper 
mirror 
locking 
screw