Chip is socketed, so yeah, it can be swapped out. It's the chip with the last four digits being "0053".
I think James1095 has my old Mac II board. He might be willing to part it out. When I did get it powered up by jumpering three AA batteries to the pins on the dead PRAM battery (yes, smoke was produced from the battery), it did go to the floppy disk icon with the "?". Didn't get any farther since the Rodime 40MB drive was toast. I currently have a IIfx board in the original II case. Works great. That might be another option for you. Either that, or the IIx. I think there's a IIx board on evilBay at the moment. Will need new batteries soldered on, or to have the later-style battery holders installed. Yes, it's an early IIx board.
-J
I think James1095 has my old Mac II board. He might be willing to part it out. When I did get it powered up by jumpering three AA batteries to the pins on the dead PRAM battery (yes, smoke was produced from the battery), it did go to the floppy disk icon with the "?". Didn't get any farther since the Rodime 40MB drive was toast. I currently have a IIfx board in the original II case. Works great. That might be another option for you. Either that, or the IIx. I think there's a IIx board on evilBay at the moment. Will need new batteries soldered on, or to have the later-style battery holders installed. Yes, it's an early IIx board.
-J