Not sure how that's possible. F8 on the PPB board supplys the 50V out connector J7 pins 8 and 9. It's a Yel/Vio wire. That Yel/Vio wire goes to the 5 solenoids I mentioned above. If F8 blows there is no voltage on that Yel/Vio wire and so none of the coils could be working. If you are saying some are still working, then you've got some unknown hack to your game and troubleshooting is going to be difficult.
So, verify that with the game on and F8 removed/blown, that on each of those coils there is a Yel/Vio wire connected to the banded end of the diode/lug on each of those 5 coils. With your meter on VDC, measure from that banded diode end with the red lead of your meter, black lead on ground. You should have 0V or negligible. If you mysteriously have 50V on any one of those 5 coils, then something's been hacked.
In any case, find which coils DO have the Yel/Vio wire on them and have 0V. The problem will be with one of those coils/diodes. In order for F8 to immediately blow upon power up, there is an instant short. That instant short is mostly likely coming from a combination of two things. You have a shorted transistor on the PPB board for one of those 5 coils AND the diode for that coil on the shorted transistor is shorted as well. What probably happened at some point in time is that the diode on the coil was shorted and it took out the transistor.
So, what you need to do:
Identify the 5 transistors on the PPB board for those coils. They are Q1 through Q5. With power off the machine and your meter on OHMs/Continuity, put the red lead on the metal tab of the transistor and the black lead on ground (use the metal screws on the board or ground strap in backbox). If you have 0 ohms/continuity on any of these transistors that's the bad one. Then identify which coil goes with that transistor and check the diode on that coil. More than likely it is shorted, or the coil itself is shorted, or the wiring to that coil is shorted.