Response from Jonathan: August,
 
Usually we would recommend leaving the linear power supply (transformer) in the cabinet so we could continue to use it for our marquee light, monitor, coin door, etc. If your linear power supply is in fact dead, you will need to figure out alternative ways to get power to these areas.
 
– The marquee light is easy as you can just hook that up directly to the AC voltage wires coming from the wall plug (or connect them together with the AC input terminals on the switching power supply).
 
– The coin door lights will be a little trickier as you will probably need to run them to one of the DC voltage outputs on the switching power supply (either +5 or +12 VDC) and change out the bulbs according to which voltage you select (see the chart in our post on Replacing Lights In An Arcade Cabinet).
 
– The monitor also needs AC voltage like the marquee light but requires it to go through an isolation transformer. You will need to purchase a new isolation transformer and wire up the AC voltage coming from the wall plug to the input. Wire up the output to the monitor and you should be set.
 
That should be everything you need to modify in order to remove the linear power supply. Remember that you will still need the switching power supply to get DC voltage to the board. Hope that helps.