Attack From Mars: the strobe tube needs to be a low-pressure type
The Attack From Mars strobe should fire about 6.25 times a second, which needs a low-pressure horseshoe strobe tube; ordinary replacement strobe tubes manage only 2 or 3 flashes a second. Don't touch the glass when fitting it. Before blaming the tube, unplug the game and check the strobe power board under the metal box at the back for broken leads.
Strobe supplies store a high voltage charge; unplug the game and let the capacitor discharge before touching the board.
Systems
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Three, Clay Harrell (pinrepair.com)