Also, when fixing coils, you don't just turn on the machine and hope for the best. You leave the pf UP so you can see/hear what's going on. THEN you turn on the machine and leave your hand on the power switch so you can turn it off right a away if you see or hear a coil energize. This not only saves you money (coils/fuses/etc) but more importantly prevents aggravating problems or causing additional damage.
Once you are happy that you won't burn down the game, then you can go into coil test and check them individually. Yes it's hard to see the DMD with the PF up but I'm sure you can manage. Once all coils seem to be working as they should, turn off the power, lower the pf, load the balls, and power on again (glass off so you can hear). You should STILL be listening for locked on coils and be ready to switch the game off quickly. Be aware that the diverters will energize while the game pre-loads the 3 balls in the VUKs. Anything more than 2-3 seconds is concerning.