This one had the infamous rtc error.
The chip was already socketed,so that was a plus.
I don't put new rtc chips in these boards,I ordered a couple in the past and they turned out to be NOS, so the batteries were already dead or lasted about a month...
Instead, I heat up the old chip with my paint stripper, peel off the plastic cover, heat it up a bit more and crack the epoxy off with a pipe wrench.
It comes off perfectly when the chip is hot enough.
On the notch side of the chip is a crystal for the clock, most of the times, it'll break off with the epoxy. The tabs on the chip are big enough, so it's very easy to solder it back on.
On the other side of the chip is a CR 1225 battery, I just break it off and solder a new one on the tabs.
The only thing to keep in mind is where the crystal and battery go on the chip, as there are no markings on the bare chip, and of course how the chip goes on the pcb.
After reprogramming the chip with the file in the Mame romset, the board played fine.
The chip was already socketed,so that was a plus.
I don't put new rtc chips in these boards,I ordered a couple in the past and they turned out to be NOS, so the batteries were already dead or lasted about a month...
Instead, I heat up the old chip with my paint stripper, peel off the plastic cover, heat it up a bit more and crack the epoxy off with a pipe wrench.
It comes off perfectly when the chip is hot enough.
On the notch side of the chip is a crystal for the clock, most of the times, it'll break off with the epoxy. The tabs on the chip are big enough, so it's very easy to solder it back on.
On the other side of the chip is a CR 1225 battery, I just break it off and solder a new one on the tabs.
The only thing to keep in mind is where the crystal and battery go on the chip, as there are no markings on the bare chip, and of course how the chip goes on the pcb.
After reprogramming the chip with the file in the Mame romset, the board played fine.