It could be a number of things really.
If it has never been used I would speak to HPC.
If it was working before you moved it you could....
Do a test fire from the machine panel, if it fires it is a software issue, if not...
Put a bit of card in front of the tube before 1st mirror and test fire, if it fires the mirrors are out, if not...
Check the tube for any damage, ensure no water in the outer tube and both ends are secure.
Check the leads to the tube are still attached.
Check the door switches have not come loose.
Check the power setting on software and laser panel just in case it has been adjusted (menu, laser set).
The flow sensor may be partially blocked - you can bypass it to test.
Using two LS3060's and an ex 3020 user