If the machine is on your test bench - you wont get a 7th Flash. If the board is in the machine, you need to test the voltages out of the Power Supply Board - specifically - for the +43VDC for the coils - I think it is TP5 ? Most likely a fuse.
I dont get a sixth flash mate, so better get that before the seventh. :)
Sheesh.. Sorry about that !
I recall a similar issue where one of the tracks from U11 (lower of the PIAs) was cut - must have done that at the time that I replaced the socket. Double check your work around that area.