Quoted from Blackbeard:Thanks.
Q4 and Q5 buzzed, so thinking that they're shorted. And this is assuming I tested correctly.
So when I did power up at my house for the first time after buying it, all kinds of things were funny.. DMD, shaker motor went off like crazy, etc. The only thing I found was a T Rex switch wire had come loose and was somewhat touching the same switches OTHER lug. I fixed that and a lot of things got better..
I'm wondering if just replacing those two transistors would fix things. I'd HATE to have to go through and remove all diodes from coils and test them. I'd rather just replace the Q4 and Q5 and hope things work.
THOUGHTS? Also a source for tip36c? Marco has them at appx $4 each! GPE is out.
1st thought is just replacing random things and hoping they solve the problem is generally a poor way to go about solving the problem.
2nd thought is that I too would tend to agree with ThePinballCo-op that its either a diode or a loose solder connection.
3rd thought.. Slow Down. Perfectly understandable to have a new game and wanna play it. Go over that switch matrix and look for the common denominator. Go back over those connections very slowly and methodically especially the ones associated with the raptor pit. Make sure you have your meter set to diode mode snd test those diodes.
It is very possible your loose t-rex wire shorted out those transistors if it was grounded when you powered up the machine. If you feel strongly that its a board issue send it to Chris Hibler. All headers would be reflowed and nvram installed if not already and will be better than new.
Just my 2 cents!
