Q3 is the culprit, also I found Q17 is cactus also (coin mech lockout I presume after looking at the schematic) the resistors & diodes are fine. I will also replace the 7407 I.C. that controls Q3 just to be safe, the cost of the I.C. & socket is way cheaper than the cost of posting it back up to me and then posting it back down to you again. I will also de solder & then re solder a couple of the transistors that have been replaced before. if you look at solder on the transistor in front of the one with its guts blown out you can see the blobs of solder holding it in.