Quoted from cfh:The cheap way to "fix" the gi flashing problem is just to remove the 2 pin connector from the right side of the power supply board. that's the connectors which energizes the GI relay. with it removed, the GI will always be "on" and won't flash. kind of anti-dramatic, but it does work.
Great tip. Thanks! On my DE Time Machine I never liked the GI flashing (LED or incandescent) but I didn't look into how to change it. I tried your tip and it works great. I don't think much is lost by disabling the GI flashing on this machine. Starwarp is a little less dramatic but at least I can always see the playfield now.