Sega Transformers Human Alliance - How to Replace the Lighting Bulb for Start Button; 17-1 Access to the Start Switch and Lamp housing is gained by first removing the Start Button Plate.; 17-2 Remove the Button Plate from the Control Panel to gain access to the Switch and Lamp housing.

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17. HOW TO REPLACE THE LIGHTING BULB FOR START BUTTON
17-1 Access to the Start Switch and Lamp housing is gained by first
removing the Start Button Plate.
17-2 Remove the Button Plate from the Control Panel to gain access to
the Switch and Lamp housing.
Start switch and
lamp housing
Unscrew 8PCS of M4*12
with 2.5mm hexagonal key
17. HOW TO REPLACE THE LIGHTING BULB FOR START BUTTON
http://op.sega.jp/op_e/