I bought this board from a well intentioned member here and it arrived a couple of weeks ago. It had some work done to it that I did not know about prior to the sale, but we worked out a happy solution for both of us.
SYMPTOM: Game had some obvious work done to the surface mount EPROM board custom chip, there was solder flux over half the chip. Game ran correctly for only about a minute before locking up.
FIX: I first removed a solder bridged connection on the custom surface mount chip mentioned above. This did nothing.
Next, I pulled an identical EPROM board from my parts box that was almost snapped in half. I rebuilt it, bridged bad traces, replaced EPROM sockets, beep tested the bad areas, and added a few wrenched out capacitors. At power up the game still hung after about a minute.
Lacking any other option, I went through the process of burning an unprotected set of chips to get rid of the suicide FD XXX-XX CPU. I pulled a standard 10Hhz 68000 CPU from my parts box. After this work, I reunited it with the original EPROM board and found I had a solid working game.
Ah, a happy ending! I thought when this model of board suicided it would only boot to a blank screen. Now I see that is not the case. Helpful knowledge for those that are fond of this hardware....it is my favorite arcade game platform.
SYMPTOM: Game had some obvious work done to the surface mount EPROM board custom chip, there was solder flux over half the chip. Game ran correctly for only about a minute before locking up.
FIX: I first removed a solder bridged connection on the custom surface mount chip mentioned above. This did nothing.
Next, I pulled an identical EPROM board from my parts box that was almost snapped in half. I rebuilt it, bridged bad traces, replaced EPROM sockets, beep tested the bad areas, and added a few wrenched out capacitors. At power up the game still hung after about a minute.
Lacking any other option, I went through the process of burning an unprotected set of chips to get rid of the suicide FD XXX-XX CPU. I pulled a standard 10Hhz 68000 CPU from my parts box. After this work, I reunited it with the original EPROM board and found I had a solid working game.
Ah, a happy ending! I thought when this model of board suicided it would only boot to a blank screen. Now I see that is not the case. Helpful knowledge for those that are fond of this hardware....it is my favorite arcade game platform.
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