Quoted from Roostking:
Hmm. 4A thats different than the fuse that blew on mine (7). Yep, mine went out at the same time as well. Fixed the fuse and all has been well since. My backglass light also went out roughly the same time(Afterwards) I wonder if I had some huge powersurge or something? This all happened about 2 months into playing and its been good for 5 months(Im back overseas for a bit again)
So, just a quick update, pulled the backglass and powered up the machine. F7 fuse LED was out, pulled the fuse and put in a new 4A slo blo, and powered machine on, and the fuse got bright red and blew! So I called Stern, spoke to Chaz, he had me unplug the main plug on the magnet board, put a new fuse in F7 and turn machine on, and the fuse did NOT blow. So Chaz says its the magnet board, and there sending another board to me. Keep in mind this was the upgraded board installed at factory, my serial number and Chaz had me check for a red dot on the I.C., and there was one. So I got a bad one, or did I over power it when I switched setting adjustment #89 abort hammer?The default is yes, I switched it to NO, and like 10 games later this happened. Would changing this setting overloaded the circuit? The hammer was getting more action when I change that setting. Someone on pinside here, said to change #89 adjustments to NO and no more problems with hammer, my hammer was fine and so was the magnet, but sometimes it would act up so I changed it anyway, cuz the responses from other pinsiders saying no more phantom strikes, and magnet grabbing stronger, made me want to do it. Or its just a bad board, it happens with mass produced things. Excellent customer service from Stern, and Gio at Pinball Refinery! Top notch all around!