I honestly can't say what the difference between the two boards are, though it looks like it's just a revision level of the board, I'll bet they're probably compatible. The base model is Fujitsu MPG3204, the letters are just engineering revisions of the electronics.
As far as getting dirt inside the disk, you aren't opening the HDA, just swapping the PCB, no risk of that. You just need to be careful removing the PCB and see what's plugged into it before you yank some wires loose.:no: If you're lucky like I was, the PCB will have contacts and no plugs, just a few screws and it falls off in your hand!
As far as getting dirt inside the disk, you aren't opening the HDA, just swapping the PCB, no risk of that. You just need to be careful removing the PCB and see what's plugged into it before you yank some wires loose.:no: If you're lucky like I was, the PCB will have contacts and no plugs, just a few screws and it falls off in your hand!
